/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=SHALLOWEST --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-simple-white-blue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:05:16,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:05:16,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:05:16,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:05:16,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:05:16,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:05:16,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:05:16,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:05:16,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:05:16,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:05:16,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:05:16,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:05:16,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:05:16,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:05:16,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:05:16,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:05:16,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:05:16,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:05:16,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:05:16,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:05:16,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:05:16,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:05:16,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:05:16,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:05:16,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:05:16,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:05:16,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:05:16,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:05:16,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:05:16,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:05:16,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:05:16,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:05:16,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:05:16,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:05:16,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:05:16,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:05:16,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:05:16,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:05:16,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:05:16,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:05:16,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:05:16,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:05:16,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:05:16,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:05:16,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:05:16,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:05:16,299 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:05:16,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:05:16,299 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:05:16,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:05:16,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:05:16,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:05:16,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:05:16,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:05:16,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:05:16,302 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:05:16,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:05:16,302 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:05:16,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:05:16,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:05:16,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:05:16,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:05:16,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:05:16,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:16,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:05:16,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:05:16,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:05:16,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:05:16,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:05:16,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:05:16,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:05:16,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:05:16,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:05:17,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:05:17,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:05:17,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:05:17,009 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:05:17,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i [2020-10-27 01:05:17,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bbd6156e/a36e834b3c0546989b511060906429a7/FLAG44f5ac593 [2020-10-27 01:05:17,961 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:05:17,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i [2020-10-27 01:05:17,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bbd6156e/a36e834b3c0546989b511060906429a7/FLAG44f5ac593 [2020-10-27 01:05:18,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bbd6156e/a36e834b3c0546989b511060906429a7 [2020-10-27 01:05:18,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:05:18,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:05:18,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:18,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:05:18,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:05:18,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ebbcce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18, skipping insertion in model container [2020-10-27 01:05:18,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:05:18,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:05:18,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:18,729 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:05:18,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:18,861 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:05:18,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18 WrapperNode [2020-10-27 01:05:18,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:18,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:05:18,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:05:18,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:05:18,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (1/1) ... [2020-10-27 01:05:18,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:05:18,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:05:18,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:05:18,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:05:18,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:19,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:05:19,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:05:19,072 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:05:19,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:05:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:05:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:05:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:05:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:05:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:05:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:05:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:05:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:05:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:05:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:05:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:05:19,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:05:19,076 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:05:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:05:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:05:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:05:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:05:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:05:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:05:19,078 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:05:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:05:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:05:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:05:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:05:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:05:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:05:19,079 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:05:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:05:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:05:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:05:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:05:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:05:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:05:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:05:19,080 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:05:19,081 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:05:19,081 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:05:19,081 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:05:19,081 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:05:19,081 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:05:19,082 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:05:19,082 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:05:19,082 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:05:19,083 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:05:19,084 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:05:19,084 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:05:19,084 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:05:19,084 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:05:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:05:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:05:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:05:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:05:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:05:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:05:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:05:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:05:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:05:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:05:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:05:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:05:19,089 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:05:19,089 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:05:19,089 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:05:19,089 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:05:19,090 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:05:19,090 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:05:19,090 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:05:19,090 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:05:19,091 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:05:19,091 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:05:19,091 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:05:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:05:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:05:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:05:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:05:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:05:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:05:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:05:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:05:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:05:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:05:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:05:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:05:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:05:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:05:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:05:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:05:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:05:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:05:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:05:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:05:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:05:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:05:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:05:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:05:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:05:19,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:05:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:05:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:05:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:05:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:05:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:05:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:05:19,808 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:05:19,809 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 01:05:19,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:19 BoogieIcfgContainer [2020-10-27 01:05:19,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:05:19,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:05:19,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:05:19,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:05:19,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:05:18" (1/3) ... [2020-10-27 01:05:19,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f8dc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:19, skipping insertion in model container [2020-10-27 01:05:19,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:18" (2/3) ... [2020-10-27 01:05:19,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f8dc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:19, skipping insertion in model container [2020-10-27 01:05:19,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:19" (3/3) ... [2020-10-27 01:05:19,820 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2020-10-27 01:05:19,833 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:05:19,839 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:05:19,855 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:05:19,889 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:05:19,889 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:05:19,889 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:05:19,889 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:05:19,889 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:05:19,889 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:05:19,890 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:05:19,890 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:05:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 01:05:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:05:19,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:19,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:19,919 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:19,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1655213968, now seen corresponding path program 1 times [2020-10-27 01:05:19,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:19,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454452205] [2020-10-27 01:05:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:20,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:20,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:05:20,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:20,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-27 01:05:20,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:20,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:05:20,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:05:21,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:21,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:21,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:21,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:21,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 01:05:21,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:21,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:21,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454452205] [2020-10-27 01:05:21,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:21,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:21,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137001638] [2020-10-27 01:05:21,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:21,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:21,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:21,143 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 8 states. [2020-10-27 01:05:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:21,707 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2020-10-27 01:05:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:21,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-27 01:05:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:21,721 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:05:21,721 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:05:21,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:05:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2020-10-27 01:05:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:05:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-10-27 01:05:21,771 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2020-10-27 01:05:21,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:21,771 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-10-27 01:05:21,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-10-27 01:05:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:05:21,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:21,773 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] [2020-10-27 01:05:21,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:05:21,774 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:21,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1907723868, now seen corresponding path program 1 times [2020-10-27 01:05:21,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:21,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102432106] [2020-10-27 01:05:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:21,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:22,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:05:22,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:22,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-27 01:05:22,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:22,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:22,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:05:22,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:22,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:22,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:22,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:22,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:05:22,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:22,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:05:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:22,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102432106] [2020-10-27 01:05:22,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:22,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:22,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167246044] [2020-10-27 01:05:22,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:22,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:22,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:22,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:22,859 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 8 states. [2020-10-27 01:05:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:23,213 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-10-27 01:05:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:23,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:05:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:23,215 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:05:23,215 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:05:23,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:05:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-10-27 01:05:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:05:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-27 01:05:23,225 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 21 [2020-10-27 01:05:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:23,226 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-27 01:05:23,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-27 01:05:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:05:23,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:23,227 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] [2020-10-27 01:05:23,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:05:23,228 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1515612570, now seen corresponding path program 1 times [2020-10-27 01:05:23,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:23,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419236974] [2020-10-27 01:05:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:23,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:23,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:05:23,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:23,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-27 01:05:23,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:05:23,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:23,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:23,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:23,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:23,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:23,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:23,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:23,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:23,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:23,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:23,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:23,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419236974] [2020-10-27 01:05:23,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:23,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:23,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728853718] [2020-10-27 01:05:23,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:23,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:23,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:23,795 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 9 states. [2020-10-27 01:05:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:24,488 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-10-27 01:05:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:05:24,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-27 01:05:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:24,493 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:05:24,494 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:05:24,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:05:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2020-10-27 01:05:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:05:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-10-27 01:05:24,509 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 21 [2020-10-27 01:05:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:24,510 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-10-27 01:05:24,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-10-27 01:05:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:05:24,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:24,512 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:24,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:05:24,512 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 799266854, now seen corresponding path program 1 times [2020-10-27 01:05:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:24,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670986231] [2020-10-27 01:05:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:24,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:05:24,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:24,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 01:05:24,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:24,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:24,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:05:24,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:24,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:24,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:24,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:24,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:24,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:24,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:24,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:24,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670986231] [2020-10-27 01:05:24,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:24,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:24,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835107510] [2020-10-27 01:05:24,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:24,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:24,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:24,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:24,812 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2020-10-27 01:05:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:25,346 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2020-10-27 01:05:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:05:25,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:05:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:25,348 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:05:25,348 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:05:25,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:05:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:05:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2020-10-27 01:05:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:05:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-27 01:05:25,357 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2020-10-27 01:05:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:25,357 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-27 01:05:25,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-27 01:05:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:05:25,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:25,359 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:25,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:05:25,359 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1991786825, now seen corresponding path program 2 times [2020-10-27 01:05:25,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:25,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201745954] [2020-10-27 01:05:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:25,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:05:25,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:25,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 01:05:25,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:25,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:25,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:25,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:25,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:25,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:25,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:25,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:25,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:25,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:25,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:05:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:05:25,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201745954] [2020-10-27 01:05:25,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:25,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:25,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564650964] [2020-10-27 01:05:25,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:25,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:25,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:25,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:25,591 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 6 states. [2020-10-27 01:05:25,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:25,768 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-27 01:05:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:25,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:05:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:25,770 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:05:25,770 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:05:25,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:05:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-27 01:05:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:05:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-27 01:05:25,784 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2020-10-27 01:05:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:25,785 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-27 01:05:25,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-27 01:05:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:05:25,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:25,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:25,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:05:25,787 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:25,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1270005385, now seen corresponding path program 1 times [2020-10-27 01:05:25,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:25,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890742611] [2020-10-27 01:05:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:05:26,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:26,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-27 01:05:26,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:05:26,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:26,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:05:26,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:26,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:26,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890742611] [2020-10-27 01:05:26,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:26,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:26,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441973879] [2020-10-27 01:05:26,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:26,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:26,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:26,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:26,263 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2020-10-27 01:05:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:26,521 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-27 01:05:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:26,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:05:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:26,524 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:05:26,524 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:05:26,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:05:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-27 01:05:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:05:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-27 01:05:26,533 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 23 [2020-10-27 01:05:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:26,534 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-27 01:05:26,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-27 01:05:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:05:26,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:26,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:26,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:05:26,539 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:26,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1663032395, now seen corresponding path program 1 times [2020-10-27 01:05:26,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:26,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903719747] [2020-10-27 01:05:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:27,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:05:27,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-27 01:05:27,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:05:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:27,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:27,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:27,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:27,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:27,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:05:27,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:27,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:27,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903719747] [2020-10-27 01:05:27,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:27,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 01:05:27,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344579806] [2020-10-27 01:05:27,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:27,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:27,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:27,494 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 9 states. [2020-10-27 01:05:28,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:28,075 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-10-27 01:05:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:28,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:05:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:28,077 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:05:28,077 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:05:28,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:05:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:05:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-10-27 01:05:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:05:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-27 01:05:28,088 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 23 [2020-10-27 01:05:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:28,089 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-27 01:05:28,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-27 01:05:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:05:28,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:28,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:28,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:05:28,096 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2042394987, now seen corresponding path program 1 times [2020-10-27 01:05:28,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:28,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069868197] [2020-10-27 01:05:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:28,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:28,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:28,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:05:28,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-27 01:05:28,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:28,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:05:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:28,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:28,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:28,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:28,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:28,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:28,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:05:28,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:28,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:28,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069868197] [2020-10-27 01:05:28,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:28,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:28,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651106216] [2020-10-27 01:05:28,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:28,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:28,653 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 10 states. [2020-10-27 01:05:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:29,335 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-10-27 01:05:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:29,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 01:05:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:29,336 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:05:29,337 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:05:29,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:05:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:05:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-10-27 01:05:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:05:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-10-27 01:05:29,356 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 24 [2020-10-27 01:05:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:29,360 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-10-27 01:05:29,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-10-27 01:05:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:05:29,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:29,362 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:29,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:05:29,363 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash 917091098, now seen corresponding path program 1 times [2020-10-27 01:05:29,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:29,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865232699] [2020-10-27 01:05:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:29,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:29,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:05:29,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:29,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 01:05:29,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:29,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:29,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:29,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:05:29,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:29,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:29,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:29,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:29,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:29,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:29,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:29,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:29,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:29,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:29,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865232699] [2020-10-27 01:05:29,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:29,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:05:29,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46904490] [2020-10-27 01:05:29,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:05:29,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:05:29,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:05:29,600 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2020-10-27 01:05:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:29,854 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2020-10-27 01:05:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:29,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 01:05:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:29,857 INFO L225 Difference]: With dead ends: 83 [2020-10-27 01:05:29,858 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:05:29,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:05:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2020-10-27 01:05:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:05:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2020-10-27 01:05:29,869 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 25 [2020-10-27 01:05:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:29,869 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2020-10-27 01:05:29,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:05:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2020-10-27 01:05:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:05:29,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:29,871 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:29,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:05:29,871 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1387738926, now seen corresponding path program 1 times [2020-10-27 01:05:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:29,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351402118] [2020-10-27 01:05:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:31,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:05:31,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:31,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1234 [2020-10-27 01:05:31,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:31,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:05:31,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:31,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:31,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:31,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:31,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:31,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:05:31,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:31,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:31,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:31,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351402118] [2020-10-27 01:05:31,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:31,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:31,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007534944] [2020-10-27 01:05:31,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:31,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:31,365 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 11 states. [2020-10-27 01:05:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:31,974 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2020-10-27 01:05:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:31,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 01:05:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:31,976 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:05:31,976 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:05:31,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:05:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:05:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 74. [2020-10-27 01:05:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:05:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-10-27 01:05:31,987 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 25 [2020-10-27 01:05:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:31,988 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-10-27 01:05:31,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-10-27 01:05:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:05:31,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:31,989 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:31,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:05:31,990 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash -874384875, now seen corresponding path program 1 times [2020-10-27 01:05:31,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:31,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587700331] [2020-10-27 01:05:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:32,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:05:32,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:32,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-27 01:05:32,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:05:32,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,233 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-27 01:05:33,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:33,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:33,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:33,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587700331] [2020-10-27 01:05:33,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:33,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:33,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316835292] [2020-10-27 01:05:33,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:33,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:33,310 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 10 states. [2020-10-27 01:05:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:33,852 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-10-27 01:05:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:33,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:05:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:33,854 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:05:33,854 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:05:33,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:05:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-10-27 01:05:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:05:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-10-27 01:05:33,865 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 26 [2020-10-27 01:05:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:33,865 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-10-27 01:05:33,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-10-27 01:05:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:33,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:33,867 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:33,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:05:33,868 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880250, now seen corresponding path program 2 times [2020-10-27 01:05:33,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:33,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451103465] [2020-10-27 01:05:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:34,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-27 01:05:34,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:05:34,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:34,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:34,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:34,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:34,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451103465] [2020-10-27 01:05:34,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:34,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:34,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237651244] [2020-10-27 01:05:34,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:34,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:34,278 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 10 states. [2020-10-27 01:05:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:35,161 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2020-10-27 01:05:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:05:35,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:05:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:35,163 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:05:35,166 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 01:05:35,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 01:05:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2020-10-27 01:05:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:05:35,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-10-27 01:05:35,185 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 27 [2020-10-27 01:05:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:35,185 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-10-27 01:05:35,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-10-27 01:05:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:35,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:35,191 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:05:35,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:05:35,194 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:35,194 INFO L82 PathProgramCache]: Analyzing trace with hash -813857545, now seen corresponding path program 1 times [2020-10-27 01:05:35,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:35,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964777815] [2020-10-27 01:05:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:37,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:37,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:37,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2239 [2020-10-27 01:05:37,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:37,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:37,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:37,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:05:37,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:37,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:37,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:37,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:37,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:37,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:37,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:37,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:37,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:37,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:37,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:37,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964777815] [2020-10-27 01:05:37,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:37,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:37,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197914795] [2020-10-27 01:05:37,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:37,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:37,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:37,815 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 11 states. [2020-10-27 01:05:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:38,902 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2020-10-27 01:05:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:05:38,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 01:05:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:38,904 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:05:38,904 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:05:38,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:05:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:05:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2020-10-27 01:05:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:05:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-10-27 01:05:38,915 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 27 [2020-10-27 01:05:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:38,915 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-10-27 01:05:38,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-10-27 01:05:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:38,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:38,917 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:38,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:05:38,917 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1434445165, now seen corresponding path program 2 times [2020-10-27 01:05:38,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:38,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085542279] [2020-10-27 01:05:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:38,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:40,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1622 [2020-10-27 01:05:40,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:40,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:40,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:40,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:40,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:40,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:40,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:40,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:40,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:40,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:40,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:40,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085542279] [2020-10-27 01:05:40,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:40,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:05:40,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252758132] [2020-10-27 01:05:40,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:05:40,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:40,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:05:40,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:40,846 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 12 states. [2020-10-27 01:05:41,982 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-27 01:05:42,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:42,422 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2020-10-27 01:05:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:05:42,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 01:05:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:42,423 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:05:42,424 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 01:05:42,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:05:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 01:05:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2020-10-27 01:05:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:05:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2020-10-27 01:05:42,438 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 27 [2020-10-27 01:05:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:42,438 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2020-10-27 01:05:42,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:05:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2020-10-27 01:05:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:42,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:42,440 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:42,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:05:42,440 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:42,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:42,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1041418155, now seen corresponding path program 1 times [2020-10-27 01:05:42,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:42,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457986670] [2020-10-27 01:05:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:45,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:05:45,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2689 [2020-10-27 01:05:45,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:45,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:45,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457986670] [2020-10-27 01:05:45,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:45,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:05:45,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64120485] [2020-10-27 01:05:45,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:05:45,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:05:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:45,664 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand 12 states. [2020-10-27 01:05:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:46,392 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2020-10-27 01:05:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:05:46,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 01:05:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:46,394 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:05:46,394 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:05:46,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:05:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:05:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-10-27 01:05:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:05:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2020-10-27 01:05:46,408 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 27 [2020-10-27 01:05:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:46,409 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2020-10-27 01:05:46,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:05:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2020-10-27 01:05:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:05:46,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:46,410 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:46,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:05:46,410 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:46,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:46,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1401853574, now seen corresponding path program 1 times [2020-10-27 01:05:46,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:46,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202815310] [2020-10-27 01:05:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:05:46,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 01:05:46,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:05:46,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:46,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:46,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:46,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:46,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:46,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:05:46,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202815310] [2020-10-27 01:05:46,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:46,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:46,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082036375] [2020-10-27 01:05:46,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:46,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:46,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:46,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:46,788 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand 6 states. [2020-10-27 01:05:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:47,001 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2020-10-27 01:05:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:47,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-27 01:05:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:47,003 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:05:47,003 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 01:05:47,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 01:05:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-27 01:05:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:05:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2020-10-27 01:05:47,016 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 28 [2020-10-27 01:05:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:47,016 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2020-10-27 01:05:47,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2020-10-27 01:05:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:05:47,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:47,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:47,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:05:47,018 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:47,018 INFO L82 PathProgramCache]: Analyzing trace with hash 713976026, now seen corresponding path program 1 times [2020-10-27 01:05:47,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:47,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291798311] [2020-10-27 01:05:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:47,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:05:47,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:47,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-27 01:05:47,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:47,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:47,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:47,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:05:47,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:47,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:47,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:47,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:47,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:47,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:47,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:47,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:47,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:47,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:47,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291798311] [2020-10-27 01:05:47,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:47,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:47,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272502967] [2020-10-27 01:05:47,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:47,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:47,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:47,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:47,704 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand 8 states. [2020-10-27 01:05:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:48,170 INFO L93 Difference]: Finished difference Result 125 states and 158 transitions. [2020-10-27 01:05:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:48,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-27 01:05:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:48,172 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:05:48,172 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:05:48,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:05:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2020-10-27 01:05:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:05:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2020-10-27 01:05:48,187 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 28 [2020-10-27 01:05:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:48,187 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2020-10-27 01:05:48,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2020-10-27 01:05:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:48,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:48,188 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:48,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:05:48,189 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:48,189 INFO L82 PathProgramCache]: Analyzing trace with hash 930335708, now seen corresponding path program 2 times [2020-10-27 01:05:48,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:48,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904335104] [2020-10-27 01:05:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:48,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:48,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:48,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-27 01:05:48,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:48,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:48,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:48,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:05:48,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:48,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:49,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:49,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:49,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:05:49,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:05:49,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904335104] [2020-10-27 01:05:49,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:49,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:05:49,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810422391] [2020-10-27 01:05:49,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:05:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:05:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:05:49,010 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand 7 states. [2020-10-27 01:05:49,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:49,243 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2020-10-27 01:05:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:49,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-27 01:05:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:49,244 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:05:49,244 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:05:49,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:05:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-27 01:05:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:05:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-10-27 01:05:49,255 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 29 [2020-10-27 01:05:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:49,256 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-10-27 01:05:49,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:05:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-10-27 01:05:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:49,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:49,256 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:49,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:05:49,257 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:49,257 INFO L82 PathProgramCache]: Analyzing trace with hash -693539371, now seen corresponding path program 3 times [2020-10-27 01:05:49,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:49,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305443723] [2020-10-27 01:05:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:49,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:49,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:49,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:49,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-27 01:05:49,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:05:49,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:49,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:49,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:49,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:49,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:49,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:49,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:49,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:49,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:49,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:49,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305443723] [2020-10-27 01:05:49,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:49,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:05:49,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096728256] [2020-10-27 01:05:49,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:05:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:05:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:49,911 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 12 states. [2020-10-27 01:05:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:51,076 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2020-10-27 01:05:51,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:05:51,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 01:05:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:51,077 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:05:51,078 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:05:51,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:05:51,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:05:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-27 01:05:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:05:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2020-10-27 01:05:51,092 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 29 [2020-10-27 01:05:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:51,094 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2020-10-27 01:05:51,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:05:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2020-10-27 01:05:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:51,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:51,095 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:51,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:05:51,095 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1180690130, now seen corresponding path program 3 times [2020-10-27 01:05:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:51,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761101239] [2020-10-27 01:05:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:51,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:56,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:56,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:05:56,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:56,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:05:56,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:56,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:56,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:56,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:56,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:56,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:56,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:56,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:56,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:56,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:56,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761101239] [2020-10-27 01:05:56,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:56,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:05:56,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851228760] [2020-10-27 01:05:56,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:05:56,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:56,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:05:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:56,520 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand 12 states. [2020-10-27 01:05:57,584 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 01:05:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:57,936 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2020-10-27 01:05:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:05:57,936 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 01:05:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:57,937 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:05:57,937 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:05:57,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:05:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:05:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2020-10-27 01:05:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:05:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2020-10-27 01:05:57,951 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 29 [2020-10-27 01:05:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:57,952 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2020-10-27 01:05:57,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:05:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2020-10-27 01:05:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:57,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:57,953 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:57,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:05:57,953 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash -865974456, now seen corresponding path program 3 times [2020-10-27 01:05:57,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:57,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387633551] [2020-10-27 01:05:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:57,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:00,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:06:00,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:00,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2133 [2020-10-27 01:06:00,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:06:00,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:00,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:00,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:00,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:00,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:00,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:00,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:00,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387633551] [2020-10-27 01:06:00,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:00,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:00,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333154205] [2020-10-27 01:06:00,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:00,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:00,257 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand 9 states. [2020-10-27 01:06:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:00,636 INFO L93 Difference]: Finished difference Result 145 states and 177 transitions. [2020-10-27 01:06:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:00,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 01:06:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:00,638 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:06:00,638 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:06:00,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:00,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:06:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2020-10-27 01:06:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:06:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2020-10-27 01:06:00,651 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 29 [2020-10-27 01:06:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:00,652 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2020-10-27 01:06:00,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2020-10-27 01:06:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:06:00,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:00,653 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:00,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:06:00,653 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:00,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:00,654 INFO L82 PathProgramCache]: Analyzing trace with hash 781932265, now seen corresponding path program 1 times [2020-10-27 01:06:00,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:00,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100864521] [2020-10-27 01:06:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:00,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:00,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:06:00,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:00,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 01:06:00,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:00,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:06:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:01,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:01,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:01,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:01,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:01,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:01,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:01,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:01,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:01,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:01,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:01,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100864521] [2020-10-27 01:06:01,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:01,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:01,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052519480] [2020-10-27 01:06:01,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:01,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:01,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:01,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:01,063 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 10 states. [2020-10-27 01:06:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:01,485 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2020-10-27 01:06:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:01,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:06:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:01,490 INFO L225 Difference]: With dead ends: 133 [2020-10-27 01:06:01,490 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:06:01,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:06:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-10-27 01:06:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:06:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-10-27 01:06:01,502 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 30 [2020-10-27 01:06:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:01,502 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-10-27 01:06:01,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-10-27 01:06:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:06:01,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:01,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:01,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:06:01,504 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:01,504 INFO L82 PathProgramCache]: Analyzing trace with hash 557747645, now seen corresponding path program 1 times [2020-10-27 01:06:01,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:01,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691712718] [2020-10-27 01:06:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:01,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:01,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:06:01,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:01,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 01:06:01,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:06:01,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:01,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:01,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:01,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:01,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:01,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:01,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:01,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:01,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:01,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:01,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:01,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691712718] [2020-10-27 01:06:01,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:01,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:01,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777265652] [2020-10-27 01:06:01,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:01,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:01,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:01,909 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 11 states. [2020-10-27 01:06:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:02,472 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2020-10-27 01:06:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:02,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:06:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:02,474 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:06:02,474 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:06:02,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:06:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2020-10-27 01:06:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:06:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-10-27 01:06:02,501 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 30 [2020-10-27 01:06:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:02,501 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-10-27 01:06:02,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-10-27 01:06:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:06:02,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:02,502 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:02,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:06:02,502 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:02,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1879555489, now seen corresponding path program 2 times [2020-10-27 01:06:02,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:02,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070489476] [2020-10-27 01:06:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:02,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:04,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:04,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:06:04,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:04,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1839 [2020-10-27 01:06:04,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:04,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:04,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:04,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:06:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:04,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:04,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:04,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:04,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:04,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:04,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:04,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:04,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:04,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:04,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:04,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:04,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070489476] [2020-10-27 01:06:04,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:04,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:04,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458600930] [2020-10-27 01:06:04,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:04,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:04,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:04,774 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 12 states. [2020-10-27 01:06:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:05,651 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2020-10-27 01:06:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:06:05,651 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:06:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:05,653 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:06:05,653 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:06:05,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:06:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2020-10-27 01:06:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:06:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2020-10-27 01:06:05,672 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 30 [2020-10-27 01:06:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:05,672 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2020-10-27 01:06:05,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2020-10-27 01:06:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:06:05,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:05,673 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:05,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:06:05,675 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1962422953, now seen corresponding path program 1 times [2020-10-27 01:06:05,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:05,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003968136] [2020-10-27 01:06:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:05,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:06,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:06,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:06:06,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:06,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-10-27 01:06:06,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:06,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:06,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:06,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:06:06,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:07,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:07,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:07,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:07,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:07,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:07,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:07,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:07,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003968136] [2020-10-27 01:06:07,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:07,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:07,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364868331] [2020-10-27 01:06:07,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:07,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:07,113 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand 13 states. [2020-10-27 01:06:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:07,886 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2020-10-27 01:06:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:07,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 01:06:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:07,887 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:06:07,887 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:06:07,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:06:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2020-10-27 01:06:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:06:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2020-10-27 01:06:07,901 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 30 [2020-10-27 01:06:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:07,901 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2020-10-27 01:06:07,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2020-10-27 01:06:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:06:07,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:07,902 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 01:06:07,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:06:07,902 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:07,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash 870869970, now seen corresponding path program 3 times [2020-10-27 01:06:07,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:07,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237808017] [2020-10-27 01:06:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:07,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:10,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:06:10,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:10,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2122 [2020-10-27 01:06:10,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:10,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:06:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:10,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:06:10,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:10,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:10,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:10,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237808017] [2020-10-27 01:06:10,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:10,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:10,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299599072] [2020-10-27 01:06:10,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:10,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:10,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:10,141 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand 8 states. [2020-10-27 01:06:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:10,505 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-10-27 01:06:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:06:10,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 01:06:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:10,507 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:06:10,507 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:06:10,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:10,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:06:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 01:06:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:06:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2020-10-27 01:06:10,519 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 31 [2020-10-27 01:06:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:10,519 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2020-10-27 01:06:10,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2020-10-27 01:06:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:06:10,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:10,520 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:10,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:06:10,520 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:10,521 INFO L82 PathProgramCache]: Analyzing trace with hash 302572961, now seen corresponding path program 1 times [2020-10-27 01:06:10,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:10,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946277325] [2020-10-27 01:06:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:10,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:11,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:06:11,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:11,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-27 01:06:11,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:06:11,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:11,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:11,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:11,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:11,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946277325] [2020-10-27 01:06:11,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:11,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:11,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067924287] [2020-10-27 01:06:11,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:11,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:11,574 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand 13 states. [2020-10-27 01:06:12,693 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 67 [2020-10-27 01:06:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:13,125 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2020-10-27 01:06:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:06:13,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 01:06:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:13,127 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:06:13,127 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:06:13,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:06:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:06:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2020-10-27 01:06:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:06:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2020-10-27 01:06:13,141 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 31 [2020-10-27 01:06:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:13,141 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2020-10-27 01:06:13,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2020-10-27 01:06:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:06:13,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:13,142 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:13,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:06:13,142 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash -284233053, now seen corresponding path program 1 times [2020-10-27 01:06:13,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:13,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806385951] [2020-10-27 01:06:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:15,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:06:15,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:06:15,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2748 [2020-10-27 01:06:15,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:06:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:06:15,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:15,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:15,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:15,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:15,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:15,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:15,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:16,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:16,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:16,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:16,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806385951] [2020-10-27 01:06:16,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:16,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:16,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852336231] [2020-10-27 01:06:16,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:16,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:16,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:16,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:16,006 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand 8 states. [2020-10-27 01:06:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:16,334 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-10-27 01:06:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:06:16,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 01:06:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:16,336 INFO L225 Difference]: With dead ends: 119 [2020-10-27 01:06:16,336 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:06:16,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:06:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2020-10-27 01:06:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:06:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-10-27 01:06:16,349 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 31 [2020-10-27 01:06:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:16,349 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-10-27 01:06:16,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-10-27 01:06:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:06:16,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:16,350 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:16,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:06:16,350 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:16,351 INFO L82 PathProgramCache]: Analyzing trace with hash 511362288, now seen corresponding path program 4 times [2020-10-27 01:06:16,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:16,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144845830] [2020-10-27 01:06:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:16,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:06:16,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:17,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:17,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:17,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:17,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:17,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:17,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:17,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:17,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:17,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144845830] [2020-10-27 01:06:17,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:17,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:17,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699389354] [2020-10-27 01:06:17,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:17,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:17,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:17,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:17,217 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 13 states. [2020-10-27 01:06:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:19,114 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2020-10-27 01:06:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:06:19,115 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 01:06:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:19,116 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:06:19,116 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:06:19,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:06:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:06:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 96. [2020-10-27 01:06:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:06:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2020-10-27 01:06:19,130 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 31 [2020-10-27 01:06:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:19,130 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2020-10-27 01:06:19,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2020-10-27 01:06:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:06:19,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:19,131 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 01:06:19,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:06:19,131 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:19,131 INFO L82 PathProgramCache]: Analyzing trace with hash 487963426, now seen corresponding path program 2 times [2020-10-27 01:06:19,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:19,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021160271] [2020-10-27 01:06:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:19,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:19,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:06:19,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:19,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-27 01:06:19,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:19,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:19,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:19,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:06:19,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:19,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:19,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:19,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:19,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:06:19,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:19,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:19,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:19,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:19,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:19,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021160271] [2020-10-27 01:06:19,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:19,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:19,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137561584] [2020-10-27 01:06:19,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:19,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:19,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:19,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:19,472 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand 11 states. [2020-10-27 01:06:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:19,934 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2020-10-27 01:06:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:19,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:06:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:19,935 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:06:19,935 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:06:19,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:06:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:06:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-10-27 01:06:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:06:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2020-10-27 01:06:19,949 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 32 [2020-10-27 01:06:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:19,949 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2020-10-27 01:06:19,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2020-10-27 01:06:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:06:19,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:19,950 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:19,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:06:19,950 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash 980797264, now seen corresponding path program 5 times [2020-10-27 01:06:19,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:19,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829027333] [2020-10-27 01:06:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:20,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:20,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:06:20,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:20,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 01:06:20,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:20,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:20,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:20,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:06:20,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:20,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:20,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:20,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:20,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:20,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:20,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:20,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:20,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:20,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:20,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:20,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829027333] [2020-10-27 01:06:20,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:20,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:20,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089428714] [2020-10-27 01:06:20,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:20,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:20,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:20,583 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand 12 states. [2020-10-27 01:06:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:21,726 INFO L93 Difference]: Finished difference Result 122 states and 147 transitions. [2020-10-27 01:06:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:21,727 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:06:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:21,727 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:06:21,727 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:06:21,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:06:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:06:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-10-27 01:06:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:06:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-27 01:06:21,740 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 32 [2020-10-27 01:06:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:21,740 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-27 01:06:21,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-27 01:06:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:06:21,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:21,741 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 01:06:21,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:06:21,741 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:21,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1003172028, now seen corresponding path program 1 times [2020-10-27 01:06:21,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:21,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337770351] [2020-10-27 01:06:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:21,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:22,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:06:22,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:22,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-27 01:06:22,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:22,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:06:22,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:23,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:23,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:23,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:23,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:23,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:23,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:23,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:23,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337770351] [2020-10-27 01:06:23,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:23,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:23,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824721568] [2020-10-27 01:06:23,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:23,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:23,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:23,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:23,039 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 9 states. [2020-10-27 01:06:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:23,444 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-27 01:06:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:23,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-27 01:06:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:23,446 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:06:23,446 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:06:23,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:06:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-10-27 01:06:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:06:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-10-27 01:06:23,458 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 32 [2020-10-27 01:06:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:23,458 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-10-27 01:06:23,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-10-27 01:06:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:06:23,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:23,459 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:23,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:06:23,459 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1112657572, now seen corresponding path program 4 times [2020-10-27 01:06:23,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:23,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683925162] [2020-10-27 01:06:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:23,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:25,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:06:25,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:25,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2096 [2020-10-27 01:06:25,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:25,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:06:25,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:25,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:25,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:25,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:25,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:25,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:25,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:25,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:25,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:25,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683925162] [2020-10-27 01:06:25,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:25,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:25,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143586034] [2020-10-27 01:06:25,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:25,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:25,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:25,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:25,740 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 10 states. [2020-10-27 01:06:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:26,271 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2020-10-27 01:06:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:26,272 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 01:06:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:26,273 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:06:26,273 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:06:26,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:06:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2020-10-27 01:06:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:06:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2020-10-27 01:06:26,286 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 32 [2020-10-27 01:06:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:26,287 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2020-10-27 01:06:26,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2020-10-27 01:06:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:06:26,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:26,288 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:26,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:06:26,288 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:26,288 INFO L82 PathProgramCache]: Analyzing trace with hash -211259753, now seen corresponding path program 1 times [2020-10-27 01:06:26,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:26,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771817217] [2020-10-27 01:06:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:26,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:26,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:06:26,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:26,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-27 01:06:26,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:26,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:26,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:26,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:06:26,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:27,272 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 01:06:27,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:27,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:27,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771817217] [2020-10-27 01:06:27,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:27,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:27,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750323814] [2020-10-27 01:06:27,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:27,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:27,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:27,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:27,431 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 14 states. [2020-10-27 01:06:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:28,458 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-10-27 01:06:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:28,458 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 01:06:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:28,459 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:06:28,460 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:06:28,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:06:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2020-10-27 01:06:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:06:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2020-10-27 01:06:28,473 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 33 [2020-10-27 01:06:28,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:28,473 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2020-10-27 01:06:28,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2020-10-27 01:06:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:06:28,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:28,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:28,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:06:28,476 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash -859805651, now seen corresponding path program 5 times [2020-10-27 01:06:28,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:28,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020333479] [2020-10-27 01:06:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:28,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:29,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:29,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:06:29,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:29,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-27 01:06:29,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:06:29,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:29,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:29,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:29,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:29,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:29,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:29,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:29,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:29,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:29,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:29,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:29,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020333479] [2020-10-27 01:06:29,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:29,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:29,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791441528] [2020-10-27 01:06:29,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:29,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:29,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:29,431 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 10 states. [2020-10-27 01:06:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:30,344 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2020-10-27 01:06:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:30,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 01:06:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:30,345 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:06:30,345 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 01:06:30,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 01:06:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2020-10-27 01:06:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:06:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-10-27 01:06:30,361 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 33 [2020-10-27 01:06:30,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:30,362 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-10-27 01:06:30,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-10-27 01:06:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:06:30,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:30,363 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:30,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:06:30,363 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:30,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1428102660, now seen corresponding path program 2 times [2020-10-27 01:06:30,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:30,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55677844] [2020-10-27 01:06:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:31,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:06:31,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:31,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-27 01:06:31,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:31,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:31,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:31,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:06:31,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:31,945 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-27 01:06:32,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:32,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:32,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:32,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:32,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:32,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:32,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:32,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:32,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:32,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:32,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55677844] [2020-10-27 01:06:32,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:32,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:32,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414220307] [2020-10-27 01:06:32,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:32,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:32,121 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 14 states. [2020-10-27 01:06:32,808 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-27 01:06:33,060 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-27 01:06:33,223 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-27 01:06:33,502 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-27 01:06:33,812 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-27 01:06:34,129 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-27 01:06:34,304 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-27 01:06:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:34,926 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-10-27 01:06:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:06:34,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 01:06:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:34,928 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:06:34,928 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:06:34,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:06:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:06:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 94. [2020-10-27 01:06:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:06:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2020-10-27 01:06:34,948 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 33 [2020-10-27 01:06:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:34,948 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2020-10-27 01:06:34,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2020-10-27 01:06:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:06:34,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:34,949 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:06:34,950 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1124493619, now seen corresponding path program 1 times [2020-10-27 01:06:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:34,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695389448] [2020-10-27 01:06:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:35,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1138 [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:06:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:36,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:36,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:36,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:36,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:36,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:36,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:36,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:36,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:36,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:36,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:36,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:36,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695389448] [2020-10-27 01:06:36,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:36,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:36,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395366722] [2020-10-27 01:06:36,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:36,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:36,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:36,652 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand 13 states. [2020-10-27 01:06:37,105 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 01:06:37,424 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-27 01:06:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:38,259 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2020-10-27 01:06:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:06:38,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:06:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:38,261 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:06:38,261 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:06:38,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:06:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:06:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2020-10-27 01:06:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:06:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-10-27 01:06:38,280 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 33 [2020-10-27 01:06:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:38,280 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-10-27 01:06:38,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2020-10-27 01:06:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:06:38,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:38,281 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:38,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:06:38,281 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:38,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1517520629, now seen corresponding path program 1 times [2020-10-27 01:06:38,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:38,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788429542] [2020-10-27 01:06:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:38,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:39,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:42,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:42,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:06:42,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:42,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3768 [2020-10-27 01:06:42,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:42,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:06:42,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:42,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:42,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:42,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:42,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:42,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:42,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:42,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:42,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:42,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:42,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:42,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:42,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788429542] [2020-10-27 01:06:42,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:42,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:42,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49914098] [2020-10-27 01:06:42,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:42,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:42,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:42,332 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand 11 states. [2020-10-27 01:06:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:42,780 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2020-10-27 01:06:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:06:42,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:06:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:42,782 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:06:42,782 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:06:42,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:06:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 105. [2020-10-27 01:06:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:06:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2020-10-27 01:06:42,799 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 33 [2020-10-27 01:06:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:42,799 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2020-10-27 01:06:42,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2020-10-27 01:06:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:06:42,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:42,800 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:42,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:06:42,800 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1219313333, now seen corresponding path program 6 times [2020-10-27 01:06:42,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:42,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667061080] [2020-10-27 01:06:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:42,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:43,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:43,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:06:43,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:43,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-27 01:06:43,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:43,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:06:43,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:44,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:44,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:44,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:44,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:44,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:44,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:44,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:44,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:44,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:44,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:44,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667061080] [2020-10-27 01:06:44,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:44,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:44,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466625221] [2020-10-27 01:06:44,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:44,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:44,020 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand 14 states. [2020-10-27 01:06:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:45,898 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2020-10-27 01:06:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:06:45,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 01:06:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:45,901 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:06:45,901 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 01:06:45,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:06:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 01:06:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-10-27 01:06:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:06:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2020-10-27 01:06:45,917 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 33 [2020-10-27 01:06:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:45,917 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2020-10-27 01:06:45,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2020-10-27 01:06:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:06:45,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:45,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 01:06:45,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:06:45,918 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2060735484, now seen corresponding path program 3 times [2020-10-27 01:06:45,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:45,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879781721] [2020-10-27 01:06:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:06:46,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-27 01:06:46,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:46,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:46,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:06:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:06:46,775 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-27 01:06:46,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:46,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:46,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:46,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:46,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:46,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:46,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879781721] [2020-10-27 01:06:46,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:46,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:46,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322050360] [2020-10-27 01:06:46,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:46,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:46,946 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand 13 states. [2020-10-27 01:06:47,970 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 01:06:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:48,474 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2020-10-27 01:06:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:48,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-27 01:06:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:48,475 INFO L225 Difference]: With dead ends: 133 [2020-10-27 01:06:48,475 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:06:48,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:06:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:06:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2020-10-27 01:06:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:06:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-10-27 01:06:48,488 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 34 [2020-10-27 01:06:48,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:48,488 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-10-27 01:06:48,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:48,488 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-10-27 01:06:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:06:48,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:48,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:48,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:06:48,489 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1130539435, now seen corresponding path program 7 times [2020-10-27 01:06:48,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:48,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946275121] [2020-10-27 01:06:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:48,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:48,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:06:48,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:48,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-27 01:06:48,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:06:48,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:49,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:49,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:49,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:49,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:49,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:49,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:49,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:49,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:49,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:49,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:49,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946275121] [2020-10-27 01:06:49,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:49,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:49,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386796658] [2020-10-27 01:06:49,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:49,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:49,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:49,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:49,425 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 14 states. [2020-10-27 01:06:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:50,959 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2020-10-27 01:06:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:06:50,960 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 01:06:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:50,961 INFO L225 Difference]: With dead ends: 141 [2020-10-27 01:06:50,961 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:06:50,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:06:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:06:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2020-10-27 01:06:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:06:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2020-10-27 01:06:50,977 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 34 [2020-10-27 01:06:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:50,977 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2020-10-27 01:06:50,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2020-10-27 01:06:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:06:50,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:50,978 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:06:50,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:06:50,978 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash 206228860, now seen corresponding path program 2 times [2020-10-27 01:06:50,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:50,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128819959] [2020-10-27 01:06:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:51,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:51,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:51,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:53,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:06:53,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:53,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2506 [2020-10-27 01:06:53,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:53,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:53,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:53,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:06:53,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:53,786 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-10-27 01:06:54,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:54,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:54,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:54,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:54,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:54,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:54,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128819959] [2020-10-27 01:06:54,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:54,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:54,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420534615] [2020-10-27 01:06:54,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:54,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:54,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:54,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:54,127 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand 14 states. [2020-10-27 01:06:55,084 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-27 01:06:55,381 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-27 01:06:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:56,140 INFO L93 Difference]: Finished difference Result 159 states and 192 transitions. [2020-10-27 01:06:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:56,140 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:06:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:56,142 INFO L225 Difference]: With dead ends: 159 [2020-10-27 01:06:56,142 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 01:06:56,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:06:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 01:06:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2020-10-27 01:06:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:06:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2020-10-27 01:06:56,159 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 35 [2020-10-27 01:06:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:56,159 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2020-10-27 01:06:56,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2020-10-27 01:06:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:06:56,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:56,160 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:06:56,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:06:56,160 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -17955760, now seen corresponding path program 3 times [2020-10-27 01:06:56,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:56,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933633674] [2020-10-27 01:06:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:56,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:56,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:06:56,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:56,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 01:06:56,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:56,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:56,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:06:56,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:56,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:56,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:56,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:56,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:56,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:56,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:56,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:56,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:56,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933633674] [2020-10-27 01:06:56,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:56,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:56,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6054284] [2020-10-27 01:06:56,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:56,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:56,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:56,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:56,799 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 13 states. [2020-10-27 01:06:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:57,836 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2020-10-27 01:06:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:57,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:06:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:57,838 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:06:57,838 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:06:57,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:06:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 117. [2020-10-27 01:06:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:06:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-10-27 01:06:57,876 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 35 [2020-10-27 01:06:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:57,879 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-10-27 01:06:57,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-10-27 01:06:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:06:57,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:57,880 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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] [2020-10-27 01:06:57,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:06:57,880 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1238187982, now seen corresponding path program 3 times [2020-10-27 01:06:57,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:57,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025669269] [2020-10-27 01:06:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:59,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:59,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:06:59,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:59,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1465 [2020-10-27 01:06:59,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:06:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:06:59,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:59,799 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-27 01:07:00,091 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-27 01:07:00,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:00,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:00,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:00,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:00,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:00,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:00,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:00,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:00,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025669269] [2020-10-27 01:07:00,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:00,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:00,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232394303] [2020-10-27 01:07:00,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:00,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:00,286 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 15 states. [2020-10-27 01:07:01,029 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-27 01:07:01,263 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-27 01:07:01,664 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-27 01:07:01,986 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-10-27 01:07:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:02,550 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2020-10-27 01:07:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:02,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 01:07:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:02,552 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:07:02,553 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:07:02,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:07:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:07:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-10-27 01:07:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:07:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2020-10-27 01:07:02,575 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 35 [2020-10-27 01:07:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:02,576 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2020-10-27 01:07:02,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2020-10-27 01:07:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:02,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:02,576 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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] [2020-10-27 01:07:02,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:07:02,577 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:02,577 INFO L82 PathProgramCache]: Analyzing trace with hash -980022544, now seen corresponding path program 1 times [2020-10-27 01:07:02,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:02,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068740369] [2020-10-27 01:07:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:02,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:02,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:03,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:04,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:04,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:04,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:04,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1890 [2020-10-27 01:07:04,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:04,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:04,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:04,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:07:04,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:04,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:04,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:04,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:04,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:04,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:04,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:07:04,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:04,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:04,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:04,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:04,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:04,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068740369] [2020-10-27 01:07:04,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:04,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:04,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796392439] [2020-10-27 01:07:04,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:04,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:04,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:04,951 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand 14 states. [2020-10-27 01:07:05,220 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 01:07:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:06,242 INFO L93 Difference]: Finished difference Result 151 states and 182 transitions. [2020-10-27 01:07:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:06,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:07:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:06,244 INFO L225 Difference]: With dead ends: 151 [2020-10-27 01:07:06,244 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:07:06,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:07:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-10-27 01:07:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:07:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2020-10-27 01:07:06,266 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 35 [2020-10-27 01:07:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:06,266 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2020-10-27 01:07:06,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2020-10-27 01:07:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:06,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:06,267 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:06,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:07:06,267 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1886733880, now seen corresponding path program 6 times [2020-10-27 01:07:06,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:06,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918530210] [2020-10-27 01:07:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:06,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:07,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:11,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:11,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:07:11,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:07:11,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:11,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:11,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:11,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:11,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:11,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:11,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:11,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918530210] [2020-10-27 01:07:11,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:11,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:11,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699828925] [2020-10-27 01:07:11,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:11,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:11,863 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand 14 states. [2020-10-27 01:07:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:13,040 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-10-27 01:07:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:07:13,041 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:07:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:13,042 INFO L225 Difference]: With dead ends: 149 [2020-10-27 01:07:13,042 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 01:07:13,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:07:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 01:07:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2020-10-27 01:07:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:07:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2020-10-27 01:07:13,060 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 35 [2020-10-27 01:07:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:13,060 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2020-10-27 01:07:13,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2020-10-27 01:07:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:13,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:13,061 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:13,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:07:13,061 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:13,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1839936407, now seen corresponding path program 4 times [2020-10-27 01:07:13,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:13,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721242690] [2020-10-27 01:07:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:13,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:14,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:14,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:14,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:14,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1217 [2020-10-27 01:07:14,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:07:14,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:14,992 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-27 01:07:15,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:15,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:15,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:15,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:15,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:15,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:15,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:15,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721242690] [2020-10-27 01:07:15,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:15,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190892963] [2020-10-27 01:07:15,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:15,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:15,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:15,168 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 15 states. [2020-10-27 01:07:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:16,898 INFO L93 Difference]: Finished difference Result 169 states and 204 transitions. [2020-10-27 01:07:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:16,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 01:07:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:16,900 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:07:16,900 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 01:07:16,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:07:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 01:07:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-27 01:07:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:07:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 161 transitions. [2020-10-27 01:07:16,925 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 161 transitions. Word has length 35 [2020-10-27 01:07:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:16,926 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 161 transitions. [2020-10-27 01:07:16,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 161 transitions. [2020-10-27 01:07:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:07:16,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:16,927 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:16,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:07:16,927 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:16,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:16,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2143545448, now seen corresponding path program 2 times [2020-10-27 01:07:16,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:16,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095052520] [2020-10-27 01:07:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:17,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:18,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:18,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:07:18,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:18,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-27 01:07:18,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:18,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:18,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:18,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:18,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:18,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:18,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:18,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:18,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:18,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:18,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:18,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:18,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:07:18,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095052520] [2020-10-27 01:07:18,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:18,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:18,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562434676] [2020-10-27 01:07:18,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:18,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:18,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:18,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:18,572 INFO L87 Difference]: Start difference. First operand 132 states and 161 transitions. Second operand 13 states. [2020-10-27 01:07:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:19,325 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2020-10-27 01:07:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:07:19,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:07:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:19,327 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:07:19,327 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 01:07:19,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:07:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 01:07:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 129. [2020-10-27 01:07:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:07:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2020-10-27 01:07:19,346 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 35 [2020-10-27 01:07:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:19,346 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2020-10-27 01:07:19,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2020-10-27 01:07:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:07:19,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:19,347 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 01:07:19,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:07:19,347 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash -747463942, now seen corresponding path program 1 times [2020-10-27 01:07:19,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:19,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561912178] [2020-10-27 01:07:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:19,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:19,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1577 [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:07:20,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:21,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:21,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:21,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:21,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:21,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:21,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:21,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:21,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:07:21,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561912178] [2020-10-27 01:07:21,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:21,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:21,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941108994] [2020-10-27 01:07:21,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:21,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:21,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:21,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:21,338 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 13 states. [2020-10-27 01:07:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:22,207 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2020-10-27 01:07:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:22,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 01:07:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:22,209 INFO L225 Difference]: With dead ends: 151 [2020-10-27 01:07:22,210 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:07:22,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:07:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2020-10-27 01:07:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:07:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 159 transitions. [2020-10-27 01:07:22,244 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 159 transitions. Word has length 36 [2020-10-27 01:07:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:22,245 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 159 transitions. [2020-10-27 01:07:22,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 159 transitions. [2020-10-27 01:07:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:07:22,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:22,245 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:22,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:07:22,246 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:22,246 INFO L82 PathProgramCache]: Analyzing trace with hash 203933599, now seen corresponding path program 7 times [2020-10-27 01:07:22,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:22,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927307823] [2020-10-27 01:07:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:22,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:25,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:07:25,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:25,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2752 [2020-10-27 01:07:25,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:25,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:07:25,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:25,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:07:25,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:25,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:25,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:25,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:25,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927307823] [2020-10-27 01:07:25,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:25,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:07:25,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284380290] [2020-10-27 01:07:25,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:07:25,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:07:25,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:07:25,169 INFO L87 Difference]: Start difference. First operand 131 states and 159 transitions. Second operand 10 states. [2020-10-27 01:07:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:25,902 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2020-10-27 01:07:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:07:25,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-27 01:07:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:25,904 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:07:25,904 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:07:25,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:07:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-27 01:07:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:07:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-10-27 01:07:25,932 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 36 [2020-10-27 01:07:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:25,932 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-10-27 01:07:25,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:07:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-10-27 01:07:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:07:25,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:25,933 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:25,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:07:25,933 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash 464227785, now seen corresponding path program 5 times [2020-10-27 01:07:25,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:25,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219793472] [2020-10-27 01:07:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:25,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 740 [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:07:26,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:27,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:27,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:27,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:27,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:27,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:27,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:07:27,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:27,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:27,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219793472] [2020-10-27 01:07:27,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:27,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:27,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810982292] [2020-10-27 01:07:27,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:27,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:27,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:27,282 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 15 states. [2020-10-27 01:07:28,258 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-27 01:07:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:28,878 INFO L93 Difference]: Finished difference Result 155 states and 183 transitions. [2020-10-27 01:07:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:28,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 01:07:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:28,879 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:07:28,880 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:07:28,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:07:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 124. [2020-10-27 01:07:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:07:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2020-10-27 01:07:28,898 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 36 [2020-10-27 01:07:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:28,898 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2020-10-27 01:07:28,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2020-10-27 01:07:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:07:28,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:28,899 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:28,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:07:28,900 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:28,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:28,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1394423834, now seen corresponding path program 8 times [2020-10-27 01:07:28,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:28,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357108068] [2020-10-27 01:07:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:28,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:29,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:29,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:07:29,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:29,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-27 01:07:29,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:07:29,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:30,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:30,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:30,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:30,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:30,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:30,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:30,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:30,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:30,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357108068] [2020-10-27 01:07:30,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:30,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:30,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98147655] [2020-10-27 01:07:30,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:30,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:30,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:30,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:30,038 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand 15 states. [2020-10-27 01:07:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:32,390 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2020-10-27 01:07:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:07:32,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 01:07:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:32,392 INFO L225 Difference]: With dead ends: 190 [2020-10-27 01:07:32,393 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:07:32,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:07:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:07:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2020-10-27 01:07:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:07:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2020-10-27 01:07:32,414 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 36 [2020-10-27 01:07:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:32,414 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2020-10-27 01:07:32,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2020-10-27 01:07:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:32,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:32,415 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:32,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:07:32,415 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:32,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1980827425, now seen corresponding path program 4 times [2020-10-27 01:07:32,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:32,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650067930] [2020-10-27 01:07:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:32,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:32,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:32,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:32,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:32,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-27 01:07:32,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:07:32,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:33,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:33,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:33,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:33,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:33,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:33,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:33,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:07:33,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650067930] [2020-10-27 01:07:33,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:33,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63593086] [2020-10-27 01:07:33,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:33,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:33,180 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand 13 states. [2020-10-27 01:07:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:34,065 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2020-10-27 01:07:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:34,065 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 01:07:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:34,067 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:07:34,067 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:07:34,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:07:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:07:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2020-10-27 01:07:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:07:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-10-27 01:07:34,083 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 37 [2020-10-27 01:07:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:34,084 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-10-27 01:07:34,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-10-27 01:07:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:34,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:34,084 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:34,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:07:34,084 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1287772405, now seen corresponding path program 4 times [2020-10-27 01:07:34,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:34,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050834951] [2020-10-27 01:07:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:34,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:34,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:34,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:34,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-27 01:07:34,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:34,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:34,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:34,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:07:34,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:34,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:34,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:34,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050834951] [2020-10-27 01:07:34,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:34,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:34,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331447151] [2020-10-27 01:07:34,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:34,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:34,783 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 14 states. [2020-10-27 01:07:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:35,544 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2020-10-27 01:07:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:35,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 01:07:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:35,546 INFO L225 Difference]: With dead ends: 151 [2020-10-27 01:07:35,546 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 01:07:35,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:07:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 01:07:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2020-10-27 01:07:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:07:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 139 transitions. [2020-10-27 01:07:35,564 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 139 transitions. Word has length 37 [2020-10-27 01:07:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:35,564 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 139 transitions. [2020-10-27 01:07:35,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 139 transitions. [2020-10-27 01:07:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:35,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:35,565 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:35,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:07:35,565 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash 357764816, now seen corresponding path program 9 times [2020-10-27 01:07:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:35,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63166009] [2020-10-27 01:07:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:35,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:36,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:36,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:36,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-27 01:07:36,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:07:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:36,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:36,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:36,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:36,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:36,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:36,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:36,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:36,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:36,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63166009] [2020-10-27 01:07:36,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:36,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:36,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30141632] [2020-10-27 01:07:36,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:36,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:36,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:36,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:36,473 INFO L87 Difference]: Start difference. First operand 119 states and 139 transitions. Second operand 14 states. [2020-10-27 01:07:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:38,405 INFO L93 Difference]: Finished difference Result 165 states and 194 transitions. [2020-10-27 01:07:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:07:38,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 01:07:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:38,407 INFO L225 Difference]: With dead ends: 165 [2020-10-27 01:07:38,407 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 01:07:38,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:07:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 01:07:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2020-10-27 01:07:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:07:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2020-10-27 01:07:38,431 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 37 [2020-10-27 01:07:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:38,431 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2020-10-27 01:07:38,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2020-10-27 01:07:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:38,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:38,432 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:38,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:07:38,432 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1170678871, now seen corresponding path program 5 times [2020-10-27 01:07:38,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:38,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616521024] [2020-10-27 01:07:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:38,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2939 [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:07:41,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:41,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:41,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:41,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:41,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:41,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:41,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:41,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616521024] [2020-10-27 01:07:41,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:41,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:41,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844049871] [2020-10-27 01:07:41,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:41,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:41,930 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand 14 states. [2020-10-27 01:07:43,179 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-27 01:07:43,422 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-27 01:07:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:43,951 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2020-10-27 01:07:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:43,951 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 01:07:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:43,952 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:07:43,952 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:07:43,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:07:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:07:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 122. [2020-10-27 01:07:43,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:07:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-10-27 01:07:43,979 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 37 [2020-10-27 01:07:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:43,979 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-10-27 01:07:43,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:43,979 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-10-27 01:07:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:43,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:43,980 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:43,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:07:43,980 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash 159561621, now seen corresponding path program 2 times [2020-10-27 01:07:43,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:43,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961321017] [2020-10-27 01:07:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:44,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:44,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:44,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:44,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:48,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:48,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:07:48,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4244 [2020-10-27 01:07:48,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:48,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:48,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:48,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:07:48,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:48,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:48,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:48,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961321017] [2020-10-27 01:07:48,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:48,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:48,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667461607] [2020-10-27 01:07:48,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:48,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:48,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:48,597 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 15 states. [2020-10-27 01:07:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:49,906 INFO L93 Difference]: Finished difference Result 160 states and 188 transitions. [2020-10-27 01:07:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:49,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 01:07:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:49,908 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:07:49,908 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 01:07:49,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 01:07:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2020-10-27 01:07:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:07:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2020-10-27 01:07:49,931 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 37 [2020-10-27 01:07:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:49,932 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2020-10-27 01:07:49,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2020-10-27 01:07:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:49,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:49,932 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:49,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:07:49,933 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash 688328813, now seen corresponding path program 2 times [2020-10-27 01:07:49,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:49,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885381276] [2020-10-27 01:07:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:49,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:50,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:52,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:52,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:52,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2192 [2020-10-27 01:07:52,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:07:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:07:52,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:52,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:52,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:52,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:52,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:52,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:52,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:52,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:52,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:52,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:52,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:07:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885381276] [2020-10-27 01:07:52,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:52,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:52,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301406345] [2020-10-27 01:07:52,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:52,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:52,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:52,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:52,323 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand 11 states. [2020-10-27 01:07:53,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:53,063 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2020-10-27 01:07:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:53,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-27 01:07:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:53,065 INFO L225 Difference]: With dead ends: 151 [2020-10-27 01:07:53,065 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 01:07:53,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 01:07:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 122. [2020-10-27 01:07:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:07:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-10-27 01:07:53,091 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 37 [2020-10-27 01:07:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:53,091 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-10-27 01:07:53,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-10-27 01:07:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:53,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:53,092 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-27 01:07:53,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:07:53,092 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash -273737971, now seen corresponding path program 6 times [2020-10-27 01:07:53,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:53,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985502215] [2020-10-27 01:07:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:53,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:54,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:07:54,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:54,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1512 [2020-10-27 01:07:54,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:54,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:54,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:54,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:07:54,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:55,896 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 62 [2020-10-27 01:07:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:56,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:56,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:56,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:56,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:56,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:56,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:56,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985502215] [2020-10-27 01:07:56,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:56,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:07:56,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293407459] [2020-10-27 01:07:56,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:07:56,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:56,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:07:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:56,084 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 16 states. [2020-10-27 01:07:57,245 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-27 01:07:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:57,610 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2020-10-27 01:07:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:57,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 01:07:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:57,612 INFO L225 Difference]: With dead ends: 166 [2020-10-27 01:07:57,612 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 01:07:57,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 01:07:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2020-10-27 01:07:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:07:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2020-10-27 01:07:57,631 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 37 [2020-10-27 01:07:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:57,632 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2020-10-27 01:07:57,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:07:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2020-10-27 01:07:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:07:57,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:57,632 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:57,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:07:57,632 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash -922283869, now seen corresponding path program 8 times [2020-10-27 01:07:57,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:57,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596938117] [2020-10-27 01:07:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:57,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:57,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:02,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:02,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:08:02,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:08:02,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:08:02,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:02,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:02,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:02,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:08:02,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:03,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:03,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:03,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:03,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:03,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:03,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:03,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:03,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596938117] [2020-10-27 01:08:03,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:03,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:03,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644689698] [2020-10-27 01:08:03,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:03,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:03,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:03,486 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand 15 states. [2020-10-27 01:08:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:04,860 INFO L93 Difference]: Finished difference Result 179 states and 215 transitions. [2020-10-27 01:08:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:08:04,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 01:08:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:04,862 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:08:04,862 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:08:04,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:08:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:08:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2020-10-27 01:08:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 01:08:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2020-10-27 01:08:04,890 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 37 [2020-10-27 01:08:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:04,890 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2020-10-27 01:08:04,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2020-10-27 01:08:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:08:04,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:04,891 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:04,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:08:04,892 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:04,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:04,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1490580878, now seen corresponding path program 6 times [2020-10-27 01:08:04,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:04,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660361479] [2020-10-27 01:08:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:05,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:06,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:08:06,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:06,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1710 [2020-10-27 01:08:06,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:06,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:08:06,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:07,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:07,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:07,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:07,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:07,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:07,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:07,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660361479] [2020-10-27 01:08:07,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:07,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:07,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541172246] [2020-10-27 01:08:07,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:07,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:07,528 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand 16 states. [2020-10-27 01:08:08,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:08,941 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2020-10-27 01:08:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:08:08,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 01:08:08,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:08,943 INFO L225 Difference]: With dead ends: 174 [2020-10-27 01:08:08,943 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 01:08:08,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:08:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 01:08:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-27 01:08:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:08:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2020-10-27 01:08:08,965 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 37 [2020-10-27 01:08:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:08,965 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2020-10-27 01:08:08,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:08,965 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2020-10-27 01:08:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:08:08,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:08,966 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 01:08:08,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:08:08,966 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:08,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1740471251, now seen corresponding path program 1 times [2020-10-27 01:08:08,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:08,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737767105] [2020-10-27 01:08:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:09,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:09,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:08:09,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:09,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 901 [2020-10-27 01:08:09,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:08:09,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:10,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:10,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:10,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:10,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:10,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:10,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:08:10,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:10,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:10,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:10,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737767105] [2020-10-27 01:08:10,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:10,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:10,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078402999] [2020-10-27 01:08:10,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:10,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:10,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:10,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:10,606 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand 16 states. [2020-10-27 01:08:11,803 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-27 01:08:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:12,352 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2020-10-27 01:08:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:08:12,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 01:08:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:12,354 INFO L225 Difference]: With dead ends: 176 [2020-10-27 01:08:12,354 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 01:08:12,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 01:08:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2020-10-27 01:08:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:08:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 153 transitions. [2020-10-27 01:08:12,384 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 153 transitions. Word has length 38 [2020-10-27 01:08:12,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:12,384 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 153 transitions. [2020-10-27 01:08:12,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 153 transitions. [2020-10-27 01:08:12,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:08:12,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:12,385 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:12,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:08:12,385 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:12,386 INFO L82 PathProgramCache]: Analyzing trace with hash 685658766, now seen corresponding path program 7 times [2020-10-27 01:08:12,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:12,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747797628] [2020-10-27 01:08:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:13,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:13,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:08:13,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:13,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-27 01:08:13,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:13,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:13,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:08:13,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:14,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:14,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:14,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:14,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:14,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:14,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:14,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:14,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:14,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747797628] [2020-10-27 01:08:14,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:14,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381293605] [2020-10-27 01:08:14,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:14,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:14,253 INFO L87 Difference]: Start difference. First operand 130 states and 153 transitions. Second operand 15 states. [2020-10-27 01:08:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:15,883 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2020-10-27 01:08:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:15,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 01:08:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:15,885 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:08:15,885 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:08:15,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:08:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 134. [2020-10-27 01:08:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 01:08:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 159 transitions. [2020-10-27 01:08:15,910 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 159 transitions. Word has length 38 [2020-10-27 01:08:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:15,910 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 159 transitions. [2020-10-27 01:08:15,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 159 transitions. [2020-10-27 01:08:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:08:15,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:15,911 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:15,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:08:15,911 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:15,912 INFO L82 PathProgramCache]: Analyzing trace with hash 37112868, now seen corresponding path program 9 times [2020-10-27 01:08:15,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:15,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705388269] [2020-10-27 01:08:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:15,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:08:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:17,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1336 [2020-10-27 01:08:17,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:17,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:08:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:17,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:17,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705388269] [2020-10-27 01:08:17,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:17,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:17,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957008572] [2020-10-27 01:08:17,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:17,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:17,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:17,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:17,516 INFO L87 Difference]: Start difference. First operand 134 states and 159 transitions. Second operand 12 states. [2020-10-27 01:08:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:18,832 INFO L93 Difference]: Finished difference Result 185 states and 219 transitions. [2020-10-27 01:08:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:08:18,832 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 01:08:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:18,834 INFO L225 Difference]: With dead ends: 185 [2020-10-27 01:08:18,834 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 01:08:18,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:08:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 01:08:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-27 01:08:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 01:08:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2020-10-27 01:08:18,860 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 38 [2020-10-27 01:08:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:18,860 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2020-10-27 01:08:18,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2020-10-27 01:08:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:08:18,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:18,861 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:18,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:08:18,861 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash -355914142, now seen corresponding path program 1 times [2020-10-27 01:08:18,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:18,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782286326] [2020-10-27 01:08:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:18,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:19,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:19,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:21,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:21,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:08:21,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:21,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2821 [2020-10-27 01:08:21,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:08:21,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:22,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:22,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:22,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:22,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:22,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:22,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:22,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:22,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:22,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:22,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:22,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:08:22,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782286326] [2020-10-27 01:08:22,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:22,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:22,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395024661] [2020-10-27 01:08:22,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:22,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:22,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:22,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:22,284 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 13 states. [2020-10-27 01:08:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:23,174 INFO L93 Difference]: Finished difference Result 189 states and 220 transitions. [2020-10-27 01:08:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:23,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 01:08:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:23,176 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:08:23,177 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 01:08:23,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:08:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 01:08:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-10-27 01:08:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:08:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2020-10-27 01:08:23,199 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 38 [2020-10-27 01:08:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:23,199 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2020-10-27 01:08:23,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2020-10-27 01:08:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:08:23,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:23,200 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:23,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 01:08:23,200 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:23,200 INFO L82 PathProgramCache]: Analyzing trace with hash 297407054, now seen corresponding path program 7 times [2020-10-27 01:08:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:23,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073265608] [2020-10-27 01:08:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:24,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:24,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:08:24,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:24,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1340 [2020-10-27 01:08:24,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:08:24,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:25,347 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-27 01:08:25,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:25,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:25,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:25,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:25,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:08:25,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:25,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:25,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073265608] [2020-10-27 01:08:25,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:25,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:25,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588269850] [2020-10-27 01:08:25,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:25,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:25,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:25,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:25,593 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand 16 states. [2020-10-27 01:08:26,672 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-27 01:08:26,987 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-27 01:08:27,181 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-10-27 01:08:27,492 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-27 01:08:27,889 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-27 01:08:28,227 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 83 [2020-10-27 01:08:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:29,259 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2020-10-27 01:08:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:29,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 01:08:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:29,261 INFO L225 Difference]: With dead ends: 196 [2020-10-27 01:08:29,261 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 01:08:29,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:08:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 01:08:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-27 01:08:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:08:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2020-10-27 01:08:29,293 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 38 [2020-10-27 01:08:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:29,294 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2020-10-27 01:08:29,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2020-10-27 01:08:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:08:29,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:29,294 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:29,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 01:08:29,295 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:29,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1227603103, now seen corresponding path program 10 times [2020-10-27 01:08:29,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:29,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606172933] [2020-10-27 01:08:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:29,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:08:30,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:31,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:31,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:31,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:31,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:31,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:31,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:31,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:31,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:31,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606172933] [2020-10-27 01:08:31,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:31,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:31,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027640184] [2020-10-27 01:08:31,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:31,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:31,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:31,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:31,030 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand 16 states. [2020-10-27 01:08:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:33,844 INFO L93 Difference]: Finished difference Result 189 states and 225 transitions. [2020-10-27 01:08:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:08:33,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 01:08:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:33,846 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:08:33,846 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 01:08:33,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:08:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 01:08:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-10-27 01:08:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:08:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2020-10-27 01:08:33,897 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 38 [2020-10-27 01:08:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:33,897 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2020-10-27 01:08:33,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2020-10-27 01:08:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:08:33,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:33,898 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:33,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 01:08:33,898 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1962088538, now seen corresponding path program 5 times [2020-10-27 01:08:33,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:33,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229937373] [2020-10-27 01:08:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:33,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:34,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:08:34,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:34,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-27 01:08:34,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:34,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:34,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:34,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:08:34,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:34,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:34,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:34,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:34,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:34,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:34,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:34,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:34,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229937373] [2020-10-27 01:08:34,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:34,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499819626] [2020-10-27 01:08:34,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:34,658 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand 14 states. [2020-10-27 01:08:35,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:35,453 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2020-10-27 01:08:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:35,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 01:08:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:35,455 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:08:35,455 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 01:08:35,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:08:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 01:08:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-10-27 01:08:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:08:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2020-10-27 01:08:35,479 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 39 [2020-10-27 01:08:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:35,479 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2020-10-27 01:08:35,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2020-10-27 01:08:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:08:35,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:35,480 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:35,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 01:08:35,480 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -860212516, now seen corresponding path program 8 times [2020-10-27 01:08:35,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:35,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616307235] [2020-10-27 01:08:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:35,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:36,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:36,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:08:36,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-27 01:08:36,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:36,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:36,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:36,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:08:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:36,823 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-27 01:08:37,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:37,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:37,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:37,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:37,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:37,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:37,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:37,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:37,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:37,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:37,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:37,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616307235] [2020-10-27 01:08:37,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:37,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:37,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978406412] [2020-10-27 01:08:37,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:37,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:37,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:37,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:37,079 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 15 states. [2020-10-27 01:08:38,225 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-27 01:08:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:39,171 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2020-10-27 01:08:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:39,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 01:08:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:39,173 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:08:39,173 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:08:39,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:08:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:08:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2020-10-27 01:08:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:08:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2020-10-27 01:08:39,195 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 39 [2020-10-27 01:08:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:39,196 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2020-10-27 01:08:39,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2020-10-27 01:08:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:08:39,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:39,196 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:39,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 01:08:39,197 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash 83283706, now seen corresponding path program 3 times [2020-10-27 01:08:39,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:39,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062793983] [2020-10-27 01:08:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:39,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:40,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:44,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:44,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:08:44,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:08:44,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4816 [2020-10-27 01:08:44,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:44,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:44,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:44,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:08:44,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:44,277 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-27 01:08:44,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:44,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:44,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:44,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:44,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:44,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:44,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:44,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:44,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:44,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:44,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:44,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062793983] [2020-10-27 01:08:44,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:44,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:44,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223256122] [2020-10-27 01:08:44,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:44,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:44,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:44,507 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand 15 states. [2020-10-27 01:08:46,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:46,065 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2020-10-27 01:08:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:46,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 01:08:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:46,067 INFO L225 Difference]: With dead ends: 168 [2020-10-27 01:08:46,067 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:08:46,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:08:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:08:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 125. [2020-10-27 01:08:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:08:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2020-10-27 01:08:46,099 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 39 [2020-10-27 01:08:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:46,100 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2020-10-27 01:08:46,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2020-10-27 01:08:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:08:46,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:46,100 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:46,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 01:08:46,101 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash -518710549, now seen corresponding path program 11 times [2020-10-27 01:08:46,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:46,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753470678] [2020-10-27 01:08:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:46,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:46,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:46,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:08:46,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:46,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-27 01:08:46,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:46,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:08:46,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:47,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:47,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:47,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:47,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:47,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:47,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:47,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:47,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:47,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:47,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753470678] [2020-10-27 01:08:47,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:47,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:47,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589940749] [2020-10-27 01:08:47,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:47,532 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand 16 states. [2020-10-27 01:08:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:49,918 INFO L93 Difference]: Finished difference Result 165 states and 196 transitions. [2020-10-27 01:08:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:08:49,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 01:08:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:49,919 INFO L225 Difference]: With dead ends: 165 [2020-10-27 01:08:49,920 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 01:08:49,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:08:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 01:08:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 132. [2020-10-27 01:08:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:08:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-10-27 01:08:49,959 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 39 [2020-10-27 01:08:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:49,959 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-10-27 01:08:49,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-10-27 01:08:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:08:49,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:49,960 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:49,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 01:08:49,960 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:49,960 INFO L82 PathProgramCache]: Analyzing trace with hash 294203506, now seen corresponding path program 8 times [2020-10-27 01:08:49,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:49,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718243911] [2020-10-27 01:08:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:50,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:50,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:51,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:54,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:54,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:08:54,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4655 [2020-10-27 01:08:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:08:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:55,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:55,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:55,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:55,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718243911] [2020-10-27 01:08:55,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:55,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:55,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317059916] [2020-10-27 01:08:55,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:55,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:55,215 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 15 states. [2020-10-27 01:08:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:56,514 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2020-10-27 01:08:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:08:56,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 01:08:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:56,517 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:08:56,517 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 01:08:56,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 01:08:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 129. [2020-10-27 01:08:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 01:08:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-27 01:08:56,553 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 39 [2020-10-27 01:08:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:56,553 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-27 01:08:56,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-27 01:08:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:08:56,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:56,554 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:56,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 01:08:56,554 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash -188146552, now seen corresponding path program 3 times [2020-10-27 01:08:56,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:56,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254572951] [2020-10-27 01:08:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:56,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:56,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:57,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:00,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:00,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:09:00,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:00,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3438 [2020-10-27 01:09:00,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:00,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:00,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:00,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:09:00,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:00,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:00,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:00,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:00,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:00,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:00,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:00,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:00,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:00,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:09:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:09:00,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254572951] [2020-10-27 01:09:00,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:00,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:00,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611434806] [2020-10-27 01:09:00,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:00,329 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 12 states. [2020-10-27 01:09:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:01,235 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2020-10-27 01:09:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:01,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 01:09:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:01,237 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:09:01,237 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:09:01,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:09:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2020-10-27 01:09:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:09:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2020-10-27 01:09:01,273 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 39 [2020-10-27 01:09:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:01,273 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2020-10-27 01:09:01,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2020-10-27 01:09:01,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:09:01,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:01,274 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:01,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-27 01:09:01,274 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1143500877, now seen corresponding path program 9 times [2020-10-27 01:09:01,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:01,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871495002] [2020-10-27 01:09:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:01,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking...