/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:10:03,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:10:03,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:10:03,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:10:03,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:10:03,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:10:03,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:10:03,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:10:03,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:10:03,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:10:03,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:10:03,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:10:03,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:10:03,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:10:03,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:10:03,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:10:03,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:10:03,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:10:03,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:10:03,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:10:03,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:10:03,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:10:03,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:10:03,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:10:03,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:10:03,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:10:03,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:10:03,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:10:03,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:10:03,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:10:03,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:10:03,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:10:03,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:10:03,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:10:03,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:10:03,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:10:03,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:10:03,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:10:03,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:10:03,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:10:03,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:10:03,165 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 [2020-10-29 09:10:03,221 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:10:03,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:10:03,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:10:03,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:10:03,223 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:10:03,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:10:03,223 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:10:03,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:10:03,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:10:03,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:10:03,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:10:03,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:10:03,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:10:03,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:10:03,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:10:03,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:10:03,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:10:03,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:10:03,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:10:03,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:10:03,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:10:03,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:03,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:10:03,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:10:03,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:10:03,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:10:03,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:10:03,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:10:03,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:10:03,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:10:03,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:10:03,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:10:03,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:10:03,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:10:03,672 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:10:03,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-29 09:10:03,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50598a145/7fb0e945e21145b589bd250f1451ed62/FLAG72bbb90f2 [2020-10-29 09:10:04,372 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:10:04,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-29 09:10:04,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50598a145/7fb0e945e21145b589bd250f1451ed62/FLAG72bbb90f2 [2020-10-29 09:10:04,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50598a145/7fb0e945e21145b589bd250f1451ed62 [2020-10-29 09:10:04,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:10:04,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:10:04,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:04,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:10:04,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:10:04,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:04" (1/1) ... [2020-10-29 09:10:04,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135faebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:04, skipping insertion in model container [2020-10-29 09:10:04,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:04" (1/1) ... [2020-10-29 09:10:04,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:10:04,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:10:05,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:05,082 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:10:05,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:05,257 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:10:05,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05 WrapperNode [2020-10-29 09:10:05,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:05,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:10:05,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:10:05,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:10:05,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (1/1) ... [2020-10-29 09:10:05,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:10:05,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:10:05,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:10:05,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:10:05,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (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 [2020-10-29 09:10:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:10:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:10:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:10:05,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:10:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:10:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:10:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:10:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:10:05,414 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:10:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:10:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:10:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:10:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:10:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:10:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:10:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:10:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:10:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:10:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:10:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:10:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:10:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:10:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:10:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:10:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:10:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:10:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:10:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:10:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:10:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:10:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:10:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:10:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:10:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:10:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:10:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:10:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:10:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:10:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:10:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:10:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:10:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:10:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:10:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:10:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:10:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:10:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:10:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:10:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:10:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:10:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:10:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:10:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:10:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:10:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:10:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:10:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:10:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:10:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:10:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:10:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:10:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:10:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:10:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:10:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:10:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:10:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:10:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:10:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:10:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:10:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:10:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:10:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:10:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:10:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:10:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:10:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:10:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:10:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:10:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:10:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:10:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:10:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:10:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:10:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:10:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:10:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:10:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:10:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:10:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:10:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:10:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:10:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:10:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:10:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:10:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:10:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:10:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:10:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:10:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:10:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:10:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:10:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:10:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:10:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:10:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:10:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:10:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:10:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:10:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:10:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:10:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:10:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:10:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:10:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:10:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:10:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:10:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:10:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:10:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:10:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:10:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:10:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:10:06,058 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:10:06,059 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-29 09:10:06,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:06 BoogieIcfgContainer [2020-10-29 09:10:06,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:10:06,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:10:06,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:10:06,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:10:06,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:10:04" (1/3) ... [2020-10-29 09:10:06,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30808908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:06, skipping insertion in model container [2020-10-29 09:10:06,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:05" (2/3) ... [2020-10-29 09:10:06,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30808908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:06, skipping insertion in model container [2020-10-29 09:10:06,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:06" (3/3) ... [2020-10-29 09:10:06,071 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2020-10-29 09:10:06,084 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:10:06,090 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:10:06,105 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:10:06,134 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:10:06,134 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:10:06,134 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:10:06,134 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:10:06,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:10:06,135 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:10:06,135 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:10:06,135 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:10:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-29 09:10:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:10:06,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:06,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:06,163 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1827068410, now seen corresponding path program 1 times [2020-10-29 09:10:06,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:06,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938423927] [2020-10-29 09:10:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:06,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:06,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:07,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:07,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:10:07,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:07,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 912 [2020-10-29 09:10:07,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:07,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:10:07,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:10:07,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:07,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:07,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:07,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:07,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:07,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:07,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:07,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938423927] [2020-10-29 09:10:07,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:07,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:10:07,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363589839] [2020-10-29 09:10:07,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:07,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:07,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:07,629 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 8 states. [2020-10-29 09:10:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:08,505 INFO L93 Difference]: Finished difference Result 112 states and 173 transitions. [2020-10-29 09:10:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:08,507 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-29 09:10:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:08,518 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:10:08,518 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:10:08,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:10:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-29 09:10:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:10:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-29 09:10:08,574 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 21 [2020-10-29 09:10:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:08,575 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-29 09:10:08,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-29 09:10:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:10:08,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:08,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:08,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:10:08,577 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash 111622871, now seen corresponding path program 1 times [2020-10-29 09:10:08,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:08,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630867174] [2020-10-29 09:10:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:08,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:08,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:08,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:08,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:09,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:09,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:10:09,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:09,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-10-29 09:10:09,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:09,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:09,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:10:09,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:09,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:09,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:09,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:09,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:09,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:09,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:09,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:09,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:09,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:09,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:09,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:09,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630867174] [2020-10-29 09:10:09,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:09,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:10:09,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833802170] [2020-10-29 09:10:09,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:09,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:09,808 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 8 states. [2020-10-29 09:10:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:10,164 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2020-10-29 09:10:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:10,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-29 09:10:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:10,167 INFO L225 Difference]: With dead ends: 81 [2020-10-29 09:10:10,167 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 09:10:10,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:10,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 09:10:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2020-10-29 09:10:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:10:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-29 09:10:10,180 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2020-10-29 09:10:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:10,180 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-29 09:10:10,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-29 09:10:10,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:10:10,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:10,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:10,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:10:10,183 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash 791681241, now seen corresponding path program 1 times [2020-10-29 09:10:10,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:10,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071481756] [2020-10-29 09:10:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:10,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:10,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:10:10,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:10,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-29 09:10:10,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:10,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:10,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:10,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:10,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:10:10,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:10,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:10,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:10,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:10,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:10,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:10,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:10,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:10,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:10,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:10,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:10,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:10,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071481756] [2020-10-29 09:10:10,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:10,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:10:10,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805164583] [2020-10-29 09:10:10,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:10,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:10,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:10,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:10,977 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2020-10-29 09:10:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:11,321 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-10-29 09:10:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:11,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-29 09:10:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:11,324 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:10:11,324 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:10:11,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:10:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-29 09:10:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:10:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-29 09:10:11,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2020-10-29 09:10:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:11,343 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-29 09:10:11,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-29 09:10:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:10:11,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:11,344 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] [2020-10-29 09:10:11,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:10:11,345 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash 19277548, now seen corresponding path program 1 times [2020-10-29 09:10:11,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:11,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107604054] [2020-10-29 09:10:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:11,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:11,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:10:12,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-29 09:10:12,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:12,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:10:12,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:10:12,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:12,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:12,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:12,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:12,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:12,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:12,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:12,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:12,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:12,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:12,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:12,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107604054] [2020-10-29 09:10:12,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:12,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:12,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747196966] [2020-10-29 09:10:12,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:12,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:12,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:12,535 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 6 states. [2020-10-29 09:10:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:12,861 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-10-29 09:10:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:12,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:10:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:12,868 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:10:12,868 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:10:12,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:10:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-10-29 09:10:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:10:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2020-10-29 09:10:12,887 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 23 [2020-10-29 09:10:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:12,889 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2020-10-29 09:10:12,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2020-10-29 09:10:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:10:12,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:12,891 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] [2020-10-29 09:10:12,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:10:12,891 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:12,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1378432434, now seen corresponding path program 1 times [2020-10-29 09:10:12,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:12,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246273143] [2020-10-29 09:10:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:12,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:13,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:10:13,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:13,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-29 09:10:13,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:13,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:13,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:13,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:13,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:10:13,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:14,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:14,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:14,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:14,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:14,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:14,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:14,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:14,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:14,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:14,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:14,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246273143] [2020-10-29 09:10:14,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:14,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841513065] [2020-10-29 09:10:14,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:14,403 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 11 states. [2020-10-29 09:10:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:15,424 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-10-29 09:10:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:15,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-29 09:10:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:15,426 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:10:15,426 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 09:10:15,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:10:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 09:10:15,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2020-10-29 09:10:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:10:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2020-10-29 09:10:15,438 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 25 [2020-10-29 09:10:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:15,439 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2020-10-29 09:10:15,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:15,439 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2020-10-29 09:10:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:10:15,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:15,440 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] [2020-10-29 09:10:15,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:10:15,441 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:15,441 INFO L82 PathProgramCache]: Analyzing trace with hash 396574928, now seen corresponding path program 1 times [2020-10-29 09:10:15,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:15,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559700188] [2020-10-29 09:10:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:15,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:15,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:15,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:18,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:10:18,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:18,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2561 [2020-10-29 09:10:18,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:18,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:18,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:18,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:18,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:18,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:18,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:18,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:18,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:18,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:18,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559700188] [2020-10-29 09:10:18,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:18,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:18,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157578079] [2020-10-29 09:10:18,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:18,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:18,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:18,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:18,245 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand 10 states. [2020-10-29 09:10:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:18,846 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2020-10-29 09:10:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:18,847 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-29 09:10:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:18,848 INFO L225 Difference]: With dead ends: 99 [2020-10-29 09:10:18,848 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:10:18,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:10:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2020-10-29 09:10:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:10:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2020-10-29 09:10:18,863 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 25 [2020-10-29 09:10:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:18,864 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2020-10-29 09:10:18,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2020-10-29 09:10:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:10:18,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:18,866 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] [2020-10-29 09:10:18,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:10:18,866 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:18,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1076633298, now seen corresponding path program 1 times [2020-10-29 09:10:18,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:18,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010998272] [2020-10-29 09:10:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:18,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:10:20,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:20,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-10-29 09:10:20,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:20,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:10:20,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:21,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:21,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:21,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:21,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010998272] [2020-10-29 09:10:21,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:21,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:21,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404072891] [2020-10-29 09:10:21,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:21,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:21,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:21,211 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand 9 states. [2020-10-29 09:10:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:21,823 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2020-10-29 09:10:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:21,823 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-29 09:10:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:21,825 INFO L225 Difference]: With dead ends: 121 [2020-10-29 09:10:21,825 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 09:10:21,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 09:10:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 61. [2020-10-29 09:10:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:10:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2020-10-29 09:10:21,848 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 25 [2020-10-29 09:10:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:21,849 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2020-10-29 09:10:21,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2020-10-29 09:10:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:10:21,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:21,855 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] [2020-10-29 09:10:21,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:10:21,855 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash 243059799, now seen corresponding path program 1 times [2020-10-29 09:10:21,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:21,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976522964] [2020-10-29 09:10:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:26,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:10:26,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:10:26,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:10:26,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:26,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:26,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:26,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:26,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:10:26,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:27,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:27,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:27,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:27,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:27,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:27,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:27,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:27,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:27,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:27,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:27,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:27,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976522964] [2020-10-29 09:10:27,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:27,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:27,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227950659] [2020-10-29 09:10:27,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:27,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:27,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:27,129 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 10 states. [2020-10-29 09:10:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:27,817 INFO L93 Difference]: Finished difference Result 147 states and 197 transitions. [2020-10-29 09:10:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:27,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:10:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:27,821 INFO L225 Difference]: With dead ends: 147 [2020-10-29 09:10:27,821 INFO L226 Difference]: Without dead ends: 128 [2020-10-29 09:10:27,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:10:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-29 09:10:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-10-29 09:10:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:10:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2020-10-29 09:10:27,849 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 26 [2020-10-29 09:10:27,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:27,850 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2020-10-29 09:10:27,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2020-10-29 09:10:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:10:27,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:27,853 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] [2020-10-29 09:10:27,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:10:27,853 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:27,854 INFO L82 PathProgramCache]: Analyzing trace with hash 923118169, now seen corresponding path program 1 times [2020-10-29 09:10:27,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:27,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512852202] [2020-10-29 09:10:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:27,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:31,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:10:31,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:10:31,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3975 [2020-10-29 09:10:31,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:31,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:31,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:10:31,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:32,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:32,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:32,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:32,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:32,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512852202] [2020-10-29 09:10:32,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:32,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:32,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920653761] [2020-10-29 09:10:32,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:32,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:32,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:32,212 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand 10 states. [2020-10-29 09:10:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:33,035 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2020-10-29 09:10:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:33,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:10:33,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:33,037 INFO L225 Difference]: With dead ends: 133 [2020-10-29 09:10:33,037 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:10:33,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:10:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 67. [2020-10-29 09:10:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:10:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-29 09:10:33,052 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 26 [2020-10-29 09:10:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:33,053 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-29 09:10:33,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-29 09:10:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:10:33,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:33,055 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] [2020-10-29 09:10:33,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:10:33,056 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1685773215, now seen corresponding path program 1 times [2020-10-29 09:10:33,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:33,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244900668] [2020-10-29 09:10:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:34,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:10:34,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:34,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1834 [2020-10-29 09:10:34,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:34,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:34,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:34,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:34,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:10:34,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:35,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:35,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:35,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244900668] [2020-10-29 09:10:35,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:35,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:35,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486977644] [2020-10-29 09:10:35,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:35,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:35,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:35,087 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 10 states. [2020-10-29 09:10:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:35,483 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-10-29 09:10:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:35,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:10:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:35,485 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:10:35,485 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:10:35,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:10:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-10-29 09:10:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:10:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-29 09:10:35,505 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 26 [2020-10-29 09:10:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:35,506 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-29 09:10:35,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-29 09:10:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:10:35,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:35,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:35,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:10:35,511 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:35,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1672684518, now seen corresponding path program 1 times [2020-10-29 09:10:35,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:35,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712959490] [2020-10-29 09:10:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:10:35,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-29 09:10:35,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:10:35,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:10:35,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:35,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:35,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:35,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:35,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:35,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712959490] [2020-10-29 09:10:35,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:35,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:10:35,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663522245] [2020-10-29 09:10:35,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:35,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:35,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:35,777 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 7 states. [2020-10-29 09:10:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:36,112 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2020-10-29 09:10:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:36,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-29 09:10:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:36,114 INFO L225 Difference]: With dead ends: 103 [2020-10-29 09:10:36,114 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:10:36,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:10:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-29 09:10:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:10:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-10-29 09:10:36,137 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 32 [2020-10-29 09:10:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:36,137 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-10-29 09:10:36,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-10-29 09:10:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:36,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:36,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:36,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:10:36,139 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -331841837, now seen corresponding path program 1 times [2020-10-29 09:10:36,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:36,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833292220] [2020-10-29 09:10:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:37,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:10:37,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:37,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-29 09:10:37,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:37,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:37,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:37,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:37,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:10:37,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:38,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:38,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:38,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:38,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:38,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:38,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:38,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:38,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833292220] [2020-10-29 09:10:38,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:38,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:38,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023419783] [2020-10-29 09:10:38,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:38,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:38,105 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 11 states. [2020-10-29 09:10:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:39,172 INFO L93 Difference]: Finished difference Result 152 states and 196 transitions. [2020-10-29 09:10:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:10:39,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-29 09:10:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:39,174 INFO L225 Difference]: With dead ends: 152 [2020-10-29 09:10:39,174 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 09:10:39,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:10:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 09:10:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-10-29 09:10:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:10:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2020-10-29 09:10:39,201 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 35 [2020-10-29 09:10:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:39,202 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2020-10-29 09:10:39,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2020-10-29 09:10:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:39,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:39,204 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:39,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:10:39,205 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:39,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1443165525, now seen corresponding path program 1 times [2020-10-29 09:10:39,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:39,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273302311] [2020-10-29 09:10:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:39,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:43,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:10:43,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:10:43,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4403 [2020-10-29 09:10:43,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:43,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:43,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:10:43,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:43,822 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-10-29 09:10:43,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:43,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:43,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:43,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:10:43,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:43,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:43,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:43,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:43,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:44,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273302311] [2020-10-29 09:10:44,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:44,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:10:44,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817738053] [2020-10-29 09:10:44,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:10:44,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:10:44,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:44,010 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand 12 states. [2020-10-29 09:10:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:45,126 INFO L93 Difference]: Finished difference Result 157 states and 201 transitions. [2020-10-29 09:10:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:10:45,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-29 09:10:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:45,127 INFO L225 Difference]: With dead ends: 157 [2020-10-29 09:10:45,128 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 09:10:45,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:10:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 09:10:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 101. [2020-10-29 09:10:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:10:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2020-10-29 09:10:45,146 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 35 [2020-10-29 09:10:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:45,146 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2020-10-29 09:10:45,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:10:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2020-10-29 09:10:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:45,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:45,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:45,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:10:45,147 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:45,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2123223895, now seen corresponding path program 1 times [2020-10-29 09:10:45,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:45,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342152166] [2020-10-29 09:10:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:49,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:49,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:10:49,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:10:49,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4367 [2020-10-29 09:10:49,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:49,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:49,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:10:49,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:49,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:49,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:49,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:49,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:49,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:49,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:49,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:49,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:49,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:49,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:49,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:49,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342152166] [2020-10-29 09:10:49,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:49,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:49,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509704215] [2020-10-29 09:10:49,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:49,913 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand 10 states. [2020-10-29 09:10:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:50,766 INFO L93 Difference]: Finished difference Result 155 states and 202 transitions. [2020-10-29 09:10:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:10:50,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-29 09:10:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:50,767 INFO L225 Difference]: With dead ends: 155 [2020-10-29 09:10:50,767 INFO L226 Difference]: Without dead ends: 136 [2020-10-29 09:10:50,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:10:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-29 09:10:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-10-29 09:10:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2020-10-29 09:10:50,785 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 35 [2020-10-29 09:10:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:50,786 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2020-10-29 09:10:50,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2020-10-29 09:10:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:10:50,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:50,787 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:50,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:10:50,788 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:50,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1334779298, now seen corresponding path program 1 times [2020-10-29 09:10:50,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:50,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447771327] [2020-10-29 09:10:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:50,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:55,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:55,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:10:55,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-29 09:10:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:10:55,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:55,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:10:55,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:56,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:56,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:56,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:56,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:56,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:56,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:56,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:56,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:56,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:56,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:56,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:56,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:56,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447771327] [2020-10-29 09:10:56,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:56,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:56,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159814012] [2020-10-29 09:10:56,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:56,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:56,045 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand 10 states. [2020-10-29 09:10:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:57,008 INFO L93 Difference]: Finished difference Result 228 states and 298 transitions. [2020-10-29 09:10:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:10:57,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-29 09:10:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:57,010 INFO L225 Difference]: With dead ends: 228 [2020-10-29 09:10:57,010 INFO L226 Difference]: Without dead ends: 213 [2020-10-29 09:10:57,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:10:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-29 09:10:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 131. [2020-10-29 09:10:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-29 09:10:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2020-10-29 09:10:57,030 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 36 [2020-10-29 09:10:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:57,030 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2020-10-29 09:10:57,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2020-10-29 09:10:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:10:57,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:57,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:57,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:10:57,032 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2014837668, now seen corresponding path program 1 times [2020-10-29 09:10:57,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:57,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498683119] [2020-10-29 09:10:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:57,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:59,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:01,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:02,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:02,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:11:02,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 09:11:02,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 09:11:02,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:02,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:11:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:02,261 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2020-10-29 09:11:02,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:02,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:02,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:02,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:02,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:02,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:02,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:02,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:02,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:02,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498683119] [2020-10-29 09:11:02,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:02,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:02,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237464302] [2020-10-29 09:11:02,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:02,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:02,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:02,522 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand 10 states. [2020-10-29 09:11:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:03,456 INFO L93 Difference]: Finished difference Result 191 states and 239 transitions. [2020-10-29 09:11:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:11:03,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-29 09:11:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:03,460 INFO L225 Difference]: With dead ends: 191 [2020-10-29 09:11:03,460 INFO L226 Difference]: Without dead ends: 187 [2020-10-29 09:11:03,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-29 09:11:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 157. [2020-10-29 09:11:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:11:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2020-10-29 09:11:03,482 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 36 [2020-10-29 09:11:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:03,483 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2020-10-29 09:11:03,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2020-10-29 09:11:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:03,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:03,484 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:03,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:11:03,484 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1516615034, now seen corresponding path program 2 times [2020-10-29 09:11:03,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:03,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141051607] [2020-10-29 09:11:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:05,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:05,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:05,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:05,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2268 [2020-10-29 09:11:05,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:05,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:11:05,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:06,133 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-29 09:11:06,492 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-29 09:11:06,688 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-29 09:11:07,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:07,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:07,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:07,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:07,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:07,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:07,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:07,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:07,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:07,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:07,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:07,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141051607] [2020-10-29 09:11:07,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:07,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:07,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296622447] [2020-10-29 09:11:07,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:07,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:07,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:07,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:07,100 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand 13 states. [2020-10-29 09:11:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:08,472 INFO L93 Difference]: Finished difference Result 247 states and 318 transitions. [2020-10-29 09:11:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:11:08,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-29 09:11:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:08,474 INFO L225 Difference]: With dead ends: 247 [2020-10-29 09:11:08,474 INFO L226 Difference]: Without dead ends: 232 [2020-10-29 09:11:08,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:11:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-29 09:11:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 197. [2020-10-29 09:11:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-29 09:11:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 252 transitions. [2020-10-29 09:11:08,504 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 252 transitions. Word has length 38 [2020-10-29 09:11:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:08,504 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 252 transitions. [2020-10-29 09:11:08,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 252 transitions. [2020-10-29 09:11:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:08,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:08,505 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:08,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:11:08,506 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1003344900, now seen corresponding path program 2 times [2020-10-29 09:11:08,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:08,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792639184] [2020-10-29 09:11:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:08,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:08,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:11:13,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:13,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:13,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:13,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:13,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:13,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792639184] [2020-10-29 09:11:13,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:13,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:13,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512637305] [2020-10-29 09:11:13,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:13,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:13,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:13,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:13,926 INFO L87 Difference]: Start difference. First operand 197 states and 252 transitions. Second operand 13 states. [2020-10-29 09:11:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:14,737 INFO L93 Difference]: Finished difference Result 301 states and 386 transitions. [2020-10-29 09:11:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:14,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-29 09:11:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:14,741 INFO L225 Difference]: With dead ends: 301 [2020-10-29 09:11:14,741 INFO L226 Difference]: Without dead ends: 286 [2020-10-29 09:11:14,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-29 09:11:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 237. [2020-10-29 09:11:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-29 09:11:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 305 transitions. [2020-10-29 09:11:14,781 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 305 transitions. Word has length 38 [2020-10-29 09:11:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:14,782 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 305 transitions. [2020-10-29 09:11:14,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 305 transitions. [2020-10-29 09:11:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:14,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:14,783 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:14,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:11:14,783 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -323286530, now seen corresponding path program 2 times [2020-10-29 09:11:14,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:14,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753002720] [2020-10-29 09:11:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:19,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:19,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:19,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:11:19,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:11:19,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:19,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:19,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:19,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:19,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:11:19,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:20,440 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-29 09:11:20,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:20,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:20,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:20,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:20,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:20,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:20,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:20,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:20,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:20,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:20,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:20,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753002720] [2020-10-29 09:11:20,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:20,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:20,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678470095] [2020-10-29 09:11:20,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:20,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:20,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:20,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:20,693 INFO L87 Difference]: Start difference. First operand 237 states and 305 transitions. Second operand 13 states. [2020-10-29 09:11:21,123 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-29 09:11:21,327 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-29 09:11:21,481 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-29 09:11:21,708 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 09:11:21,866 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-29 09:11:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:22,483 INFO L93 Difference]: Finished difference Result 380 states and 484 transitions. [2020-10-29 09:11:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:11:22,484 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-29 09:11:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:22,486 INFO L225 Difference]: With dead ends: 380 [2020-10-29 09:11:22,486 INFO L226 Difference]: Without dead ends: 361 [2020-10-29 09:11:22,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:11:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-29 09:11:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 278. [2020-10-29 09:11:22,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-29 09:11:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 358 transitions. [2020-10-29 09:11:22,532 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 358 transitions. Word has length 38 [2020-10-29 09:11:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:22,533 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 358 transitions. [2020-10-29 09:11:22,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 358 transitions. [2020-10-29 09:11:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:11:22,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:22,534 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:22,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:11:22,534 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash 962465887, now seen corresponding path program 1 times [2020-10-29 09:11:22,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:22,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028233886] [2020-10-29 09:11:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:22,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:27,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:27,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:27,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:27,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:27,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:27,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028233886] [2020-10-29 09:11:27,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:27,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:27,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794919684] [2020-10-29 09:11:27,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:27,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:27,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:27,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:27,938 INFO L87 Difference]: Start difference. First operand 278 states and 358 transitions. Second operand 12 states. [2020-10-29 09:11:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:28,809 INFO L93 Difference]: Finished difference Result 342 states and 441 transitions. [2020-10-29 09:11:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:28,810 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-29 09:11:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:28,813 INFO L225 Difference]: With dead ends: 342 [2020-10-29 09:11:28,813 INFO L226 Difference]: Without dead ends: 323 [2020-10-29 09:11:28,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-29 09:11:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 250. [2020-10-29 09:11:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-29 09:11:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 325 transitions. [2020-10-29 09:11:28,854 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 325 transitions. Word has length 39 [2020-10-29 09:11:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:28,854 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 325 transitions. [2020-10-29 09:11:28,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 325 transitions. [2020-10-29 09:11:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:11:28,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:28,856 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:28,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:11:28,856 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:28,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2004906059, now seen corresponding path program 1 times [2020-10-29 09:11:28,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:28,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459053932] [2020-10-29 09:11:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:29,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:29,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:29,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:30,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:31,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:33,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:33,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:11:33,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:34,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:34,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:34,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:34,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:34,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:34,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:34,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:34,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:34,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459053932] [2020-10-29 09:11:34,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:34,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498941302] [2020-10-29 09:11:34,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:34,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:34,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:34,144 INFO L87 Difference]: Start difference. First operand 250 states and 325 transitions. Second operand 12 states. [2020-10-29 09:11:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:35,244 INFO L93 Difference]: Finished difference Result 327 states and 418 transitions. [2020-10-29 09:11:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:11:35,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-29 09:11:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:35,247 INFO L225 Difference]: With dead ends: 327 [2020-10-29 09:11:35,247 INFO L226 Difference]: Without dead ends: 323 [2020-10-29 09:11:35,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:11:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-29 09:11:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2020-10-29 09:11:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-29 09:11:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 313 transitions. [2020-10-29 09:11:35,292 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 313 transitions. Word has length 39 [2020-10-29 09:11:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:35,292 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 313 transitions. [2020-10-29 09:11:35,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 313 transitions. [2020-10-29 09:11:35,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:11:35,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:35,294 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:35,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:11:35,294 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:35,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1175410317, now seen corresponding path program 3 times [2020-10-29 09:11:35,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:35,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974753263] [2020-10-29 09:11:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:35,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:37,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:39,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3540 [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:11:39,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:39,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:39,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:39,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:39,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:39,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:39,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:39,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:39,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:39,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:39,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:39,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:39,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:39,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974753263] [2020-10-29 09:11:39,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:39,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:39,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456674121] [2020-10-29 09:11:39,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:39,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:39,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:39,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:39,659 INFO L87 Difference]: Start difference. First operand 241 states and 313 transitions. Second operand 14 states. [2020-10-29 09:11:40,412 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-29 09:11:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:41,233 INFO L93 Difference]: Finished difference Result 310 states and 399 transitions. [2020-10-29 09:11:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:11:41,236 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-29 09:11:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:41,238 INFO L225 Difference]: With dead ends: 310 [2020-10-29 09:11:41,238 INFO L226 Difference]: Without dead ends: 295 [2020-10-29 09:11:41,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:11:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-29 09:11:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 209. [2020-10-29 09:11:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-29 09:11:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 276 transitions. [2020-10-29 09:11:41,274 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 276 transitions. Word has length 41 [2020-10-29 09:11:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:41,274 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 276 transitions. [2020-10-29 09:11:41,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 276 transitions. [2020-10-29 09:11:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:11:41,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:41,275 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:41,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:11:41,275 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:41,276 INFO L82 PathProgramCache]: Analyzing trace with hash -885941370, now seen corresponding path program 2 times [2020-10-29 09:11:41,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:41,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876207452] [2020-10-29 09:11:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:41,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:42,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:42,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:43,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:43,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5265 [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:11:46,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:46,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:46,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:46,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:46,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:46,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:46,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:46,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:46,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:46,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:46,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:46,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:46,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876207452] [2020-10-29 09:11:46,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:46,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:46,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047137323] [2020-10-29 09:11:46,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:46,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:46,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:46,968 INFO L87 Difference]: Start difference. First operand 209 states and 276 transitions. Second operand 13 states. [2020-10-29 09:11:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:47,957 INFO L93 Difference]: Finished difference Result 253 states and 330 transitions. [2020-10-29 09:11:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:47,959 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-29 09:11:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:47,961 INFO L225 Difference]: With dead ends: 253 [2020-10-29 09:11:47,961 INFO L226 Difference]: Without dead ends: 234 [2020-10-29 09:11:47,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-29 09:11:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 154. [2020-10-29 09:11:47,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-29 09:11:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2020-10-29 09:11:47,988 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 42 [2020-10-29 09:11:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:47,988 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2020-10-29 09:11:47,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2020-10-29 09:11:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:11:47,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:47,989 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:47,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:11:47,989 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:47,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:47,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1915088616, now seen corresponding path program 4 times [2020-10-29 09:11:47,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:47,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774468831] [2020-10-29 09:11:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:48,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:11:48,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:49,582 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 47 [2020-10-29 09:11:49,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:49,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:49,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:49,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:49,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:49,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:49,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:49,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:49,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774468831] [2020-10-29 09:11:49,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:49,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:49,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672541085] [2020-10-29 09:11:49,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:49,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:49,842 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand 10 states. [2020-10-29 09:11:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:50,633 INFO L93 Difference]: Finished difference Result 245 states and 307 transitions. [2020-10-29 09:11:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:50,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-29 09:11:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:50,636 INFO L225 Difference]: With dead ends: 245 [2020-10-29 09:11:50,636 INFO L226 Difference]: Without dead ends: 140 [2020-10-29 09:11:50,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:11:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-29 09:11:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2020-10-29 09:11:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-29 09:11:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 172 transitions. [2020-10-29 09:11:50,661 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 172 transitions. Word has length 45 [2020-10-29 09:11:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:50,661 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 172 transitions. [2020-10-29 09:11:50,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 172 transitions. [2020-10-29 09:11:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:11:50,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:50,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:50,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:11:50,664 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:50,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1185702655, now seen corresponding path program 5 times [2020-10-29 09:11:50,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:50,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565466818] [2020-10-29 09:11:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:50,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3225 [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:53,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:11:53,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:54,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:54,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:54,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:54,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:54,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:54,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:54,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:54,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:54,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:54,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:54,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:54,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:54,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565466818] [2020-10-29 09:11:54,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:54,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510957035] [2020-10-29 09:11:54,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:54,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:54,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:54,447 INFO L87 Difference]: Start difference. First operand 134 states and 172 transitions. Second operand 13 states. [2020-10-29 09:11:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:55,911 INFO L93 Difference]: Finished difference Result 281 states and 364 transitions. [2020-10-29 09:11:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:11:55,912 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-29 09:11:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:55,913 INFO L225 Difference]: With dead ends: 281 [2020-10-29 09:11:55,913 INFO L226 Difference]: Without dead ends: 266 [2020-10-29 09:11:55,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:11:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-29 09:11:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 220. [2020-10-29 09:11:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-29 09:11:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 281 transitions. [2020-10-29 09:11:55,971 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 281 transitions. Word has length 48 [2020-10-29 09:11:55,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:55,972 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 281 transitions. [2020-10-29 09:11:55,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 281 transitions. [2020-10-29 09:11:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:11:55,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:55,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:55,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:11:55,973 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1334257279, now seen corresponding path program 3 times [2020-10-29 09:11:55,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:55,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281061475] [2020-10-29 09:11:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:55,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:56,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:56,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:56,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:01,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:01,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:12:01,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:12:01,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 09:12:01,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:01,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:01,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:01,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:01,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:12:01,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:01,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:01,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:01,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:01,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:01,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:01,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:01,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:01,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:01,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:01,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:01,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:01,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281061475] [2020-10-29 09:12:01,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:01,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:01,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348303358] [2020-10-29 09:12:01,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:01,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:01,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:01,334 INFO L87 Difference]: Start difference. First operand 220 states and 281 transitions. Second operand 13 states. [2020-10-29 09:12:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:02,579 INFO L93 Difference]: Finished difference Result 297 states and 392 transitions. [2020-10-29 09:12:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:02,580 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-29 09:12:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:02,581 INFO L225 Difference]: With dead ends: 297 [2020-10-29 09:12:02,582 INFO L226 Difference]: Without dead ends: 282 [2020-10-29 09:12:02,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:12:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-29 09:12:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2020-10-29 09:12:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-29 09:12:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 281 transitions. [2020-10-29 09:12:02,629 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 281 transitions. Word has length 48 [2020-10-29 09:12:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:02,630 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 281 transitions. [2020-10-29 09:12:02,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 281 transitions. [2020-10-29 09:12:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:12:02,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:02,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:02,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:12:02,631 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash -654198909, now seen corresponding path program 3 times [2020-10-29 09:12:02,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:02,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501228585] [2020-10-29 09:12:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:02,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:05,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:06,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:06,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:07,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:12:07,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:12:07,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-29 09:12:07,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:07,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:07,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:07,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:07,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:12:07,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:08,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:08,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:08,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:08,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:08,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:08,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:08,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:08,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:08,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:08,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501228585] [2020-10-29 09:12:08,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:08,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:08,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465277352] [2020-10-29 09:12:08,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:08,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:08,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:08,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:08,023 INFO L87 Difference]: Start difference. First operand 220 states and 281 transitions. Second operand 13 states. [2020-10-29 09:12:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:09,184 INFO L93 Difference]: Finished difference Result 292 states and 384 transitions. [2020-10-29 09:12:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:09,184 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-29 09:12:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:09,186 INFO L225 Difference]: With dead ends: 292 [2020-10-29 09:12:09,187 INFO L226 Difference]: Without dead ends: 273 [2020-10-29 09:12:09,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:12:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-29 09:12:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 198. [2020-10-29 09:12:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-29 09:12:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 254 transitions. [2020-10-29 09:12:09,235 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 254 transitions. Word has length 48 [2020-10-29 09:12:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:09,236 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 254 transitions. [2020-10-29 09:12:09,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 254 transitions. [2020-10-29 09:12:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:12:09,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:09,237 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:09,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:12:09,237 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:09,237 INFO L82 PathProgramCache]: Analyzing trace with hash 711435296, now seen corresponding path program 2 times [2020-10-29 09:12:09,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:09,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640772226] [2020-10-29 09:12:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:09,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:09,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:10,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:10,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:13,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:13,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:14,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:14,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:12:14,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 09:12:14,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:12:14,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:14,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:14,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:14,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:14,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:12:14,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:14,679 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-10-29 09:12:14,904 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-10-29 09:12:15,033 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-10-29 09:12:15,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:15,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:15,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:15,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:15,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:15,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:15,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:15,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640772226] [2020-10-29 09:12:15,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:15,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:15,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752145939] [2020-10-29 09:12:15,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:15,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:15,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:15,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:15,367 INFO L87 Difference]: Start difference. First operand 198 states and 254 transitions. Second operand 13 states. [2020-10-29 09:12:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:17,049 INFO L93 Difference]: Finished difference Result 332 states and 422 transitions. [2020-10-29 09:12:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:12:17,049 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-29 09:12:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:17,055 INFO L225 Difference]: With dead ends: 332 [2020-10-29 09:12:17,055 INFO L226 Difference]: Without dead ends: 328 [2020-10-29 09:12:17,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:12:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-29 09:12:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 262. [2020-10-29 09:12:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-29 09:12:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 336 transitions. [2020-10-29 09:12:17,116 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 336 transitions. Word has length 49 [2020-10-29 09:12:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:17,116 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 336 transitions. [2020-10-29 09:12:17,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 336 transitions. [2020-10-29 09:12:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:12:17,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:17,118 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:17,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:12:17,118 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:17,119 INFO L82 PathProgramCache]: Analyzing trace with hash 701854648, now seen corresponding path program 6 times [2020-10-29 09:12:17,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:17,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679506064] [2020-10-29 09:12:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:19,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:22,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:22,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:12:22,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:22,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-29 09:12:22,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:22,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:12:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:12:22,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:22,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:22,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:22,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:22,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:22,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:22,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:22,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:22,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:22,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:22,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:22,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:22,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:12:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:22,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679506064] [2020-10-29 09:12:22,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:22,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:22,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897317532] [2020-10-29 09:12:22,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:22,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:22,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:22,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:22,811 INFO L87 Difference]: Start difference. First operand 262 states and 336 transitions. Second operand 15 states. [2020-10-29 09:12:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:24,627 INFO L93 Difference]: Finished difference Result 456 states and 587 transitions. [2020-10-29 09:12:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:12:24,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-29 09:12:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:24,630 INFO L225 Difference]: With dead ends: 456 [2020-10-29 09:12:24,630 INFO L226 Difference]: Without dead ends: 441 [2020-10-29 09:12:24,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:12:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-29 09:12:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 354. [2020-10-29 09:12:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-29 09:12:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 457 transitions. [2020-10-29 09:12:24,724 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 457 transitions. Word has length 51 [2020-10-29 09:12:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:24,724 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 457 transitions. [2020-10-29 09:12:24,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 457 transitions. [2020-10-29 09:12:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:12:24,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:24,726 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:24,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:12:24,726 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:24,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1818105286, now seen corresponding path program 4 times [2020-10-29 09:12:24,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:24,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772505767] [2020-10-29 09:12:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:24,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:25,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:25,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:29,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:29,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:29,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:29,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:12:29,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:12:29,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5148 [2020-10-29 09:12:29,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:29,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:29,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:12:29,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:29,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:12:29,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:30,419 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-29 09:12:30,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:30,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:30,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:30,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:30,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:30,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:30,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:30,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:30,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:30,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:30,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:30,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:30,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772505767] [2020-10-29 09:12:30,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:30,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:30,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259820345] [2020-10-29 09:12:30,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:30,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:30,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:30,685 INFO L87 Difference]: Start difference. First operand 354 states and 457 transitions. Second operand 15 states. [2020-10-29 09:12:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:32,352 INFO L93 Difference]: Finished difference Result 417 states and 533 transitions. [2020-10-29 09:12:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:12:32,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-29 09:12:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:32,356 INFO L225 Difference]: With dead ends: 417 [2020-10-29 09:12:32,356 INFO L226 Difference]: Without dead ends: 402 [2020-10-29 09:12:32,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:12:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-29 09:12:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 354. [2020-10-29 09:12:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-29 09:12:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 457 transitions. [2020-10-29 09:12:32,416 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 457 transitions. Word has length 51 [2020-10-29 09:12:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:32,416 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 457 transitions. [2020-10-29 09:12:32,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 457 transitions. [2020-10-29 09:12:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:12:32,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:32,418 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:32,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:12:32,418 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:32,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1138046916, now seen corresponding path program 4 times [2020-10-29 09:12:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:32,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365021308] [2020-10-29 09:12:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:33,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:36,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:37,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:37,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:37,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:12:37,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:12:37,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 09:12:37,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:37,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:12:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:37,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:37,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:37,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:37,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:37,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:37,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:37,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:37,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:37,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:37,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:37,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365021308] [2020-10-29 09:12:37,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:37,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:37,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017194093] [2020-10-29 09:12:37,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:37,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:37,927 INFO L87 Difference]: Start difference. First operand 354 states and 457 transitions. Second operand 14 states. [2020-10-29 09:12:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:39,035 INFO L93 Difference]: Finished difference Result 523 states and 670 transitions. [2020-10-29 09:12:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:39,036 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-29 09:12:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:39,038 INFO L225 Difference]: With dead ends: 523 [2020-10-29 09:12:39,038 INFO L226 Difference]: Without dead ends: 504 [2020-10-29 09:12:39,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-29 09:12:39,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 376. [2020-10-29 09:12:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-29 09:12:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 495 transitions. [2020-10-29 09:12:39,108 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 495 transitions. Word has length 51 [2020-10-29 09:12:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:39,109 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 495 transitions. [2020-10-29 09:12:39,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 495 transitions. [2020-10-29 09:12:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:12:39,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:39,110 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:39,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:12:39,111 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2049600777, now seen corresponding path program 3 times [2020-10-29 09:12:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:39,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804919004] [2020-10-29 09:12:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:39,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:39,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:40,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:44,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:12:44,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:12:44,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5605 [2020-10-29 09:12:44,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:44,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:44,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:44,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:44,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:12:44,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:45,264 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-29 09:12:45,461 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-29 09:12:45,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:45,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:45,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:45,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:45,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:45,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:45,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:45,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:45,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:45,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:45,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:45,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:45,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804919004] [2020-10-29 09:12:45,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:45,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:45,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114890396] [2020-10-29 09:12:45,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:45,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:45,861 INFO L87 Difference]: Start difference. First operand 376 states and 495 transitions. Second operand 15 states. [2020-10-29 09:12:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:48,187 INFO L93 Difference]: Finished difference Result 775 states and 1026 transitions. [2020-10-29 09:12:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:12:48,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-29 09:12:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:48,191 INFO L225 Difference]: With dead ends: 775 [2020-10-29 09:12:48,192 INFO L226 Difference]: Without dead ends: 756 [2020-10-29 09:12:48,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:12:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-10-29 09:12:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 544. [2020-10-29 09:12:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-10-29 09:12:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 705 transitions. [2020-10-29 09:12:48,335 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 705 transitions. Word has length 52 [2020-10-29 09:12:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:48,335 INFO L481 AbstractCegarLoop]: Abstraction has 544 states and 705 transitions. [2020-10-29 09:12:48,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 705 transitions. [2020-10-29 09:12:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:12:48,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:48,338 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:48,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:12:48,338 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1369542407, now seen corresponding path program 1 times [2020-10-29 09:12:48,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:48,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633477496] [2020-10-29 09:12:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:48,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:48,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:49,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:50,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:53,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:53,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:12:53,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:12:53,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-29 09:12:53,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:53,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:12:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:12:53,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:53,698 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-29 09:12:53,831 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-29 09:12:54,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:54,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:54,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:54,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:54,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:54,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:54,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:54,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:54,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:54,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:54,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:54,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:54,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633477496] [2020-10-29 09:12:54,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:54,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:54,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688522537] [2020-10-29 09:12:54,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:54,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:54,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:54,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:54,276 INFO L87 Difference]: Start difference. First operand 544 states and 705 transitions. Second operand 15 states. [2020-10-29 09:12:54,677 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-29 09:12:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:57,186 INFO L93 Difference]: Finished difference Result 984 states and 1279 transitions. [2020-10-29 09:12:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:12:57,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-29 09:12:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:57,206 INFO L225 Difference]: With dead ends: 984 [2020-10-29 09:12:57,206 INFO L226 Difference]: Without dead ends: 811 [2020-10-29 09:12:57,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:12:57,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-10-29 09:12:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 578. [2020-10-29 09:12:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-29 09:12:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 739 transitions. [2020-10-29 09:12:57,320 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 739 transitions. Word has length 52 [2020-10-29 09:12:57,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:57,320 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 739 transitions. [2020-10-29 09:12:57,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 739 transitions. [2020-10-29 09:12:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:12:57,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:57,323 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:57,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:12:57,323 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash 405464955, now seen corresponding path program 3 times [2020-10-29 09:12:57,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:57,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166935011] [2020-10-29 09:12:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:57,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:58,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:59,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:59,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:01,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:02,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:02,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:02,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:13:02,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:13:02,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5288 [2020-10-29 09:13:02,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:02,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:02,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:02,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:02,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:13:02,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:02,940 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-29 09:13:03,076 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-29 09:13:03,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:03,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:03,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:03,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:03,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:03,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:03,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:03,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:03,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:03,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:03,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:03,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:03,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166935011] [2020-10-29 09:13:03,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:03,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189968438] [2020-10-29 09:13:03,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:03,363 INFO L87 Difference]: Start difference. First operand 578 states and 739 transitions. Second operand 15 states. [2020-10-29 09:13:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:05,500 INFO L93 Difference]: Finished difference Result 762 states and 963 transitions. [2020-10-29 09:13:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:13:05,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-29 09:13:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:05,506 INFO L225 Difference]: With dead ends: 762 [2020-10-29 09:13:05,506 INFO L226 Difference]: Without dead ends: 758 [2020-10-29 09:13:05,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:13:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-10-29 09:13:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 482. [2020-10-29 09:13:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-10-29 09:13:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 628 transitions. [2020-10-29 09:13:05,616 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 628 transitions. Word has length 52 [2020-10-29 09:13:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:05,616 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 628 transitions. [2020-10-29 09:13:05,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 628 transitions. [2020-10-29 09:13:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:13:05,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:05,618 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:05,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:13:05,618 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash 296123487, now seen corresponding path program 7 times [2020-10-29 09:13:05,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:05,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122167310] [2020-10-29 09:13:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:06,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:08,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:09,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:11,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:11,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:13:11,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:11,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-29 09:13:11,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:11,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:11,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:13:11,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:11,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:13:11,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:11,558 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-29 09:13:11,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:11,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:11,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:11,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:11,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:11,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:11,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:11,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:11,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:11,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:11,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:11,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:11,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122167310] [2020-10-29 09:13:11,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:11,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:11,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247604521] [2020-10-29 09:13:11,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:11,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:11,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:11,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:11,822 INFO L87 Difference]: Start difference. First operand 482 states and 628 transitions. Second operand 16 states. [2020-10-29 09:13:12,777 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-29 09:13:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:13,880 INFO L93 Difference]: Finished difference Result 604 states and 779 transitions. [2020-10-29 09:13:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:13:13,880 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-29 09:13:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:13,883 INFO L225 Difference]: With dead ends: 604 [2020-10-29 09:13:13,883 INFO L226 Difference]: Without dead ends: 587 [2020-10-29 09:13:13,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:13:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-29 09:13:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 484. [2020-10-29 09:13:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-10-29 09:13:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 631 transitions. [2020-10-29 09:13:13,973 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 631 transitions. Word has length 54 [2020-10-29 09:13:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:13,974 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 631 transitions. [2020-10-29 09:13:13,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 631 transitions. [2020-10-29 09:13:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:13:13,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:13,975 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:13,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:13:13,976 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:13,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2071130849, now seen corresponding path program 5 times [2020-10-29 09:13:13,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:13,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998721815] [2020-10-29 09:13:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:14,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:15,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:17,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:19,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:19,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:13:19,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:13:19,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-29 09:13:19,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:19,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:13:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:13:19,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:19,374 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-29 09:13:19,491 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-29 09:13:19,622 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-29 09:13:19,758 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-29 09:13:20,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:20,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:20,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:20,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:20,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:20,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:20,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:20,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:20,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:20,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:20,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998721815] [2020-10-29 09:13:20,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:20,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:20,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772883296] [2020-10-29 09:13:20,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:20,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:20,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:20,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:20,277 INFO L87 Difference]: Start difference. First operand 484 states and 631 transitions. Second operand 16 states. [2020-10-29 09:13:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:22,242 INFO L93 Difference]: Finished difference Result 584 states and 756 transitions. [2020-10-29 09:13:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:13:22,243 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-29 09:13:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:22,247 INFO L225 Difference]: With dead ends: 584 [2020-10-29 09:13:22,247 INFO L226 Difference]: Without dead ends: 567 [2020-10-29 09:13:22,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:13:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2020-10-29 09:13:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 374. [2020-10-29 09:13:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-29 09:13:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 487 transitions. [2020-10-29 09:13:22,340 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 487 transitions. Word has length 54 [2020-10-29 09:13:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:22,340 INFO L481 AbstractCegarLoop]: Abstraction has 374 states and 487 transitions. [2020-10-29 09:13:22,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 487 transitions. [2020-10-29 09:13:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:13:22,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:22,342 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:22,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:13:22,342 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash -82858428, now seen corresponding path program 8 times [2020-10-29 09:13:22,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:22,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258124288] [2020-10-29 09:13:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:22,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:23,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:23,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:25,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:25,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:13:25,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:25,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2682 [2020-10-29 09:13:25,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:25,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:13:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:25,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:13:25,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:25,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:25,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:25,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:25,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:25,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:25,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:25,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:25,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:25,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:25,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:25,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258124288] [2020-10-29 09:13:25,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:25,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:13:25,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426520950] [2020-10-29 09:13:25,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:13:25,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:13:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:13:25,364 INFO L87 Difference]: Start difference. First operand 374 states and 487 transitions. Second operand 12 states. [2020-10-29 09:13:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:26,344 INFO L93 Difference]: Finished difference Result 645 states and 803 transitions. [2020-10-29 09:13:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:13:26,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-29 09:13:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:26,347 INFO L225 Difference]: With dead ends: 645 [2020-10-29 09:13:26,347 INFO L226 Difference]: Without dead ends: 398 [2020-10-29 09:13:26,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:13:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-29 09:13:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2020-10-29 09:13:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-10-29 09:13:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 505 transitions. [2020-10-29 09:13:26,431 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 505 transitions. Word has length 58 [2020-10-29 09:13:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:26,432 INFO L481 AbstractCegarLoop]: Abstraction has 398 states and 505 transitions. [2020-10-29 09:13:26,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:13:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 505 transitions. [2020-10-29 09:13:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:13:26,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:26,433 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:26,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:13:26,433 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1553339459, now seen corresponding path program 9 times [2020-10-29 09:13:26,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:26,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687994379] [2020-10-29 09:13:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:27,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:29,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:31,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:31,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:13:31,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:31,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 09:13:31,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:31,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:13:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:13:31,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:32,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:32,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:32,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:32,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:32,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:32,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:32,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:32,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:32,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:32,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:32,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:32,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:32,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687994379] [2020-10-29 09:13:32,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:32,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:32,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769762307] [2020-10-29 09:13:32,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:32,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:32,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:32,242 INFO L87 Difference]: Start difference. First operand 398 states and 505 transitions. Second operand 15 states. [2020-10-29 09:13:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:34,357 INFO L93 Difference]: Finished difference Result 771 states and 974 transitions. [2020-10-29 09:13:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:13:34,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-29 09:13:34,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:34,361 INFO L225 Difference]: With dead ends: 771 [2020-10-29 09:13:34,361 INFO L226 Difference]: Without dead ends: 754 [2020-10-29 09:13:34,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-10-29 09:13:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 680. [2020-10-29 09:13:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-10-29 09:13:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 849 transitions. [2020-10-29 09:13:34,530 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 849 transitions. Word has length 61 [2020-10-29 09:13:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:34,530 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 849 transitions. [2020-10-29 09:13:34,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 849 transitions. [2020-10-29 09:13:34,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:13:34,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:34,532 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:34,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:13:34,532 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash 221667903, now seen corresponding path program 6 times [2020-10-29 09:13:34,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:34,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532456918] [2020-10-29 09:13:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:34,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:34,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:36,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:39,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:13:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:40,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:40,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:40,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:40,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:40,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:40,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:40,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:40,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:40,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:40,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532456918] [2020-10-29 09:13:40,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:40,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:40,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063895626] [2020-10-29 09:13:40,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:40,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:40,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:40,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:40,080 INFO L87 Difference]: Start difference. First operand 680 states and 849 transitions. Second operand 15 states. [2020-10-29 09:13:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:42,153 INFO L93 Difference]: Finished difference Result 795 states and 1021 transitions. [2020-10-29 09:13:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:13:42,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-29 09:13:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:42,159 INFO L225 Difference]: With dead ends: 795 [2020-10-29 09:13:42,159 INFO L226 Difference]: Without dead ends: 778 [2020-10-29 09:13:42,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-10-29 09:13:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 678. [2020-10-29 09:13:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-10-29 09:13:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 846 transitions. [2020-10-29 09:13:42,287 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 846 transitions. Word has length 61 [2020-10-29 09:13:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:42,288 INFO L481 AbstractCegarLoop]: Abstraction has 678 states and 846 transitions. [2020-10-29 09:13:42,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 846 transitions. [2020-10-29 09:13:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:13:42,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:42,290 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:42,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:13:42,290 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash 901726273, now seen corresponding path program 5 times [2020-10-29 09:13:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:42,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717939481] [2020-10-29 09:13:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:42,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:44,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:45,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking...