/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:05:10,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:05:10,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:05:10,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:05:10,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:05:10,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:05:10,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:05:10,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:05:10,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:05:10,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:05:10,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:05:10,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:05:10,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:05:10,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:05:10,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:05:10,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:05:10,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:05:10,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:05:10,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:05:10,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:05:10,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:05:10,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:05:10,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:05:10,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:05:10,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:05:10,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:05:10,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:05:10,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:05:10,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:05:10,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:05:10,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:05:10,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:05:10,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:05:10,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:05:10,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:05:10,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:05:10,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:05:10,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:05:10,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:05:10,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:05:10,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:05:10,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:05:10,781 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:05:10,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:05:10,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:05:10,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:05:10,783 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:05:10,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:05:10,786 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:05:10,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:05:10,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:05:10,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:05:10,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:05:10,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:05:10,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:05:10,787 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:05:10,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:05:10,787 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:05:10,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:05:10,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:05:10,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:05:10,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:05:10,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:05:10,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:10,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:05:10,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:05:10,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:05:10,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:05:10,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:05:10,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:05:10,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:05:10,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:05:11,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:05:11,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:05:11,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:05:11,380 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:05:11,381 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:05:11,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-1.i [2020-10-27 01:05:11,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a19fa5413/188b64476305497c8e56d766d721ed81/FLAGeb7502261 [2020-10-27 01:05:12,208 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:05:12,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-1.i [2020-10-27 01:05:12,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a19fa5413/188b64476305497c8e56d766d721ed81/FLAGeb7502261 [2020-10-27 01:05:12,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a19fa5413/188b64476305497c8e56d766d721ed81 [2020-10-27 01:05:12,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:05:12,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:05:12,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:12,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:05:12,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:05:12,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:12" (1/1) ... [2020-10-27 01:05:12,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f986d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:12, skipping insertion in model container [2020-10-27 01:05:12,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:12" (1/1) ... [2020-10-27 01:05:12,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:05:12,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:05:12,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:12,971 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:05:13,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:13,116 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:05:13,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13 WrapperNode [2020-10-27 01:05:13,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:13,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:05:13,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:05:13,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:05:13,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (1/1) ... [2020-10-27 01:05:13,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (1/1) ... [2020-10-27 01:05:13,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (1/1) ... [2020-10-27 01:05:13,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (1/1) ... [2020-10-27 01:05:13,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (1/1) ... [2020-10-27 01:05:13,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (1/1) ... [2020-10-27 01:05:13,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (1/1) ... [2020-10-27 01:05:13,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:05:13,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:05:13,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:05:13,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:05:13,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:13,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:05:13,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:05:13,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:05:13,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:05:13,324 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:05:13,324 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:05:13,324 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:05:13,325 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:05:13,325 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:05:13,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:05:13,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:05:13,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:05:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:05:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:05:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:05:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:05:13,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:05:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:05:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:05:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:05:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:05:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:05:13,327 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:05:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:05:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:05:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:05:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:05:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:05:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:05:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:05:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:05:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:05:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:05:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:05:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:05:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:05:13,330 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:05:13,330 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:05:13,330 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:05:13,330 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:05:13,330 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:05:13,330 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:05:13,331 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:05:13,331 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:05:13,331 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:05:13,331 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:05:13,331 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:05:13,332 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:05:13,332 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:05:13,332 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:05:13,332 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:05:13,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:05:13,332 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:05:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:05:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:05:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:05:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:05:13,333 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:05:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:05:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:05:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:05:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:05:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:05:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:05:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:05:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:05:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:05:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:05:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:05:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:05:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:05:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:05:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:05:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:05:13,336 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:05:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:05:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:05:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:05:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:05:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:05:13,337 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:05:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:05:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:05:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:05:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:05:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:05:13,338 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:05:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:05:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:05:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:05:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:05:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:05:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:05:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:05:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:05:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:05:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:05:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:05:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:05:13,341 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:05:13,341 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:05:13,341 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:05:13,341 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:05:13,341 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:05:13,341 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:05:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:05:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:05:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:05:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:05:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:05:13,342 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:05:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:05:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:05:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:05:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:05:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:05:13,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:05:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:05:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:05:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:05:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:05:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:05:13,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:05:14,048 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:05:14,048 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-27 01:05:14,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:14 BoogieIcfgContainer [2020-10-27 01:05:14,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:05:14,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:05:14,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:05:14,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:05:14,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:05:12" (1/3) ... [2020-10-27 01:05:14,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9dc7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:14, skipping insertion in model container [2020-10-27 01:05:14,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:13" (2/3) ... [2020-10-27 01:05:14,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9dc7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:14, skipping insertion in model container [2020-10-27 01:05:14,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:14" (3/3) ... [2020-10-27 01:05:14,060 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-1.i [2020-10-27 01:05:14,072 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:05:14,078 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:05:14,092 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:05:14,120 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:05:14,120 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:05:14,120 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:05:14,120 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:05:14,121 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:05:14,121 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:05:14,121 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:05:14,121 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:05:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-27 01:05:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:05:14,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:14,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:14,146 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash 444257067, now seen corresponding path program 1 times [2020-10-27 01:05:14,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:14,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194545060] [2020-10-27 01:05:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:14,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 01:05:14,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:14,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-27 01:05:14,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:14,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:14,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:14,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:14,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:05:14,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:14,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:14,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:14,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:14,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:05:14,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:14,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:14,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194545060] [2020-10-27 01:05:14,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:14,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233205685] [2020-10-27 01:05:14,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:14,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:15,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:15,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:15,010 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 5 states. [2020-10-27 01:05:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:15,261 INFO L93 Difference]: Finished difference Result 102 states and 179 transitions. [2020-10-27 01:05:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:15,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-27 01:05:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:15,273 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:05:15,274 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:05:15,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:05:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-27 01:05:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:05:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-27 01:05:15,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 12 [2020-10-27 01:05:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:15,325 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-27 01:05:15,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-27 01:05:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:05:15,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:15,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:15,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:05:15,327 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:15,328 INFO L82 PathProgramCache]: Analyzing trace with hash 541512391, now seen corresponding path program 1 times [2020-10-27 01:05:15,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:15,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792297568] [2020-10-27 01:05:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:15,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:15,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:05:15,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:15,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-27 01:05:15,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:05:15,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:15,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:15,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:15,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:15,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:15,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:15,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:05:15,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:15,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:15,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:15,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792297568] [2020-10-27 01:05:15,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:15,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:15,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101285714] [2020-10-27 01:05:15,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:15,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:15,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:15,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:15,592 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 5 states. [2020-10-27 01:05:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:15,847 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-27 01:05:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:15,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 01:05:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:15,850 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:05:15,850 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:05:15,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:05:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:05:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:05:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-27 01:05:15,869 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 14 [2020-10-27 01:05:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:15,869 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-27 01:05:15,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-27 01:05:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:15,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:15,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:15,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:05:15,877 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash -38373523, now seen corresponding path program 1 times [2020-10-27 01:05:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:15,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533043716] [2020-10-27 01:05:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:15,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:16,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:16,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:16,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 01:05:16,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:16,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:16,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:16,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:05:16,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:16,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:16,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:16,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:16,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:05:16,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:16,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:16,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:16,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533043716] [2020-10-27 01:05:16,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:16,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:16,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345592896] [2020-10-27 01:05:16,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:16,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:16,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:16,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:16,178 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 6 states. [2020-10-27 01:05:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:16,481 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-27 01:05:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:16,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:05:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:16,483 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:05:16,483 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:05:16,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:05:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-10-27 01:05:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:05:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-27 01:05:16,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2020-10-27 01:05:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:16,494 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-27 01:05:16,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-27 01:05:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:05:16,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:16,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:16,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:05:16,495 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash -575459649, now seen corresponding path program 1 times [2020-10-27 01:05:16,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:16,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221345023] [2020-10-27 01:05:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:16,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:05:16,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:16,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 01:05:16,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:16,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:16,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:05:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:05:16,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:16,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:16,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:16,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:16,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:05:16,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:16,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:16,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:16,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:16,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:16,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221345023] [2020-10-27 01:05:16,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:16,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:16,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956341146] [2020-10-27 01:05:16,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:16,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:16,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:16,742 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2020-10-27 01:05:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:16,973 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-27 01:05:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:16,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 01:05:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:16,974 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:05:16,975 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:05:16,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:05:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 01:05:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:05:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-27 01:05:16,983 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2020-10-27 01:05:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:16,983 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-27 01:05:16,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-27 01:05:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:05:16,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:16,985 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] [2020-10-27 01:05:16,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:05:16,985 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:16,986 INFO L82 PathProgramCache]: Analyzing trace with hash -605625927, now seen corresponding path program 1 times [2020-10-27 01:05:16,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:16,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692524162] [2020-10-27 01:05:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:17,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:05:17,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:17,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 01:05:17,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:05:17,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:17,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:17,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:17,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:17,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:17,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:17,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:17,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:17,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:17,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:17,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692524162] [2020-10-27 01:05:17,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:17,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:17,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078294102] [2020-10-27 01:05:17,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:17,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:17,316 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 6 states. [2020-10-27 01:05:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:17,567 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-27 01:05:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:17,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 01:05:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:17,568 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:05:17,569 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:05:17,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:05:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-27 01:05:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:05:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 01:05:17,576 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 20 [2020-10-27 01:05:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:17,577 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 01:05:17,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 01:05:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:05:17,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:17,578 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] [2020-10-27 01:05:17,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:05:17,579 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:17,579 INFO L82 PathProgramCache]: Analyzing trace with hash 727972317, now seen corresponding path program 1 times [2020-10-27 01:05:17,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:17,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837246576] [2020-10-27 01:05:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:17,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:05:17,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:17,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 01:05:17,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:17,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:05:17,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:17,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:17,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:17,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:17,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:17,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:17,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:17,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837246576] [2020-10-27 01:05:17,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:17,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:05:17,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631569713] [2020-10-27 01:05:17,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:17,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:17,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:17,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:17,752 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2020-10-27 01:05:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:18,054 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-27 01:05:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:18,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:05:18,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:18,056 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:05:18,056 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:05:18,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:05:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:05:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:05:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-27 01:05:18,062 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2020-10-27 01:05:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:18,062 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-27 01:05:18,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-27 01:05:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:18,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:18,063 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:18,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:05:18,064 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1402037848, now seen corresponding path program 1 times [2020-10-27 01:05:18,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:18,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498638925] [2020-10-27 01:05:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:18,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:18,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:18,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:18,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 01:05:18,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:18,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:18,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:18,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:18,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:18,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:18,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:18,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 01:05:18,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:18,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:18,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:18,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:18,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498638925] [2020-10-27 01:05:18,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:18,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:18,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209283233] [2020-10-27 01:05:18,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:18,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:18,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:18,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:18,566 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-10-27 01:05:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:18,933 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-27 01:05:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:18,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 01:05:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:18,934 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:05:18,935 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:05:18,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:05:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2020-10-27 01:05:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:05:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-27 01:05:18,943 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 27 [2020-10-27 01:05:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:18,943 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-27 01:05:18,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-27 01:05:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:18,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:18,944 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:18,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:05:18,945 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1203985706, now seen corresponding path program 1 times [2020-10-27 01:05:18,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:18,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138811750] [2020-10-27 01:05:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:19,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:19,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-27 01:05:19,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:19,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:19,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:19,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:19,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:19,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:19,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:19,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138811750] [2020-10-27 01:05:19,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:19,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:19,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629856560] [2020-10-27 01:05:19,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:19,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:19,556 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 8 states. [2020-10-27 01:05:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:19,911 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-27 01:05:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:19,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 01:05:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:19,913 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:05:19,913 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:05:19,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:05:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2020-10-27 01:05:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:05:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-27 01:05:19,921 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-10-27 01:05:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:19,922 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-27 01:05:19,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-27 01:05:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:05:19,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:19,923 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:19,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:05:19,923 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1358786164, now seen corresponding path program 1 times [2020-10-27 01:05:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:19,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988116477] [2020-10-27 01:05:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:20,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:05:20,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:20,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-27 01:05:20,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:20,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:20,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:20,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:05:20,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:20,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:20,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:20,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:20,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:20,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:20,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:20,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:20,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988116477] [2020-10-27 01:05:20,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:20,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:20,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383429773] [2020-10-27 01:05:20,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:20,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:20,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:20,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:20,774 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-27 01:05:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:21,117 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-27 01:05:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:21,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 01:05:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:21,120 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:05:21,120 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:05:21,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:05:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-10-27 01:05:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:05:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-27 01:05:21,129 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 31 [2020-10-27 01:05:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:21,129 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-27 01:05:21,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-27 01:05:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:05:21,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:21,131 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:21,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:05:21,131 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash -446652170, now seen corresponding path program 1 times [2020-10-27 01:05:21,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:21,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835750153] [2020-10-27 01:05:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:21,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:22,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:05:22,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-10-27 01:05:22,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:22,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:05:22,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:22,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:22,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:22,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:22,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:22,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:22,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:22,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:22,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835750153] [2020-10-27 01:05:22,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:22,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:22,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743484979] [2020-10-27 01:05:22,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:22,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:22,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:22,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:22,273 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 8 states. [2020-10-27 01:05:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:22,614 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-27 01:05:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:22,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-27 01:05:22,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:22,615 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:05:22,616 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:05:22,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:05:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2020-10-27 01:05:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:05:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-27 01:05:22,635 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2020-10-27 01:05:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:22,636 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-27 01:05:22,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-27 01:05:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:05:22,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:22,637 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:22,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:05:22,638 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:22,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1448205022, now seen corresponding path program 1 times [2020-10-27 01:05:22,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:22,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906439586] [2020-10-27 01:05:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:22,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:23,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:05:23,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:23,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-27 01:05:23,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:05:23,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:23,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:23,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:23,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:23,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:23,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:23,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:23,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906439586] [2020-10-27 01:05:23,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:23,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:23,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881020987] [2020-10-27 01:05:23,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:23,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:23,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:23,650 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 9 states. [2020-10-27 01:05:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:24,155 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-27 01:05:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:24,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 01:05:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:24,156 INFO L225 Difference]: With dead ends: 83 [2020-10-27 01:05:24,156 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:05:24,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:05:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:05:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-27 01:05:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:05:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-27 01:05:24,166 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 34 [2020-10-27 01:05:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:24,166 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-27 01:05:24,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-27 01:05:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:05:24,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:24,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:24,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:05:24,168 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash -695799998, now seen corresponding path program 1 times [2020-10-27 01:05:24,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:24,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49130993] [2020-10-27 01:05:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:24,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:05:24,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:24,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 01:05:24,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:24,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:24,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:24,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:24,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:24,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:24,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:24,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:24,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:24,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:24,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49130993] [2020-10-27 01:05:24,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:24,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:24,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402045754] [2020-10-27 01:05:24,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:24,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:24,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:24,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:24,695 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2020-10-27 01:05:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:25,212 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-27 01:05:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:25,212 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 01:05:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:25,213 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:05:25,213 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:05:25,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:05:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:05:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2020-10-27 01:05:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:05:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-27 01:05:25,222 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 34 [2020-10-27 01:05:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:25,223 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-27 01:05:25,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-27 01:05:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:05:25,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:25,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:25,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:05:25,225 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1510244636, now seen corresponding path program 1 times [2020-10-27 01:05:25,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:25,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543473814] [2020-10-27 01:05:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:25,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:05:25,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:25,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 01:05:25,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:25,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:25,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:25,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:05:25,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:26,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:05:26,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:26,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:26,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:26,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:26,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543473814] [2020-10-27 01:05:26,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:26,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:26,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10120219] [2020-10-27 01:05:26,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:26,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:26,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:26,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:26,179 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 8 states. [2020-10-27 01:05:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:26,659 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-27 01:05:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:26,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 01:05:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:26,661 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:05:26,661 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:05:26,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:05:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-10-27 01:05:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:05:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-27 01:05:26,679 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 34 [2020-10-27 01:05:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:26,680 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-27 01:05:26,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-27 01:05:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:05:26,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:26,682 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:26,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:05:26,682 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:26,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash -633760384, now seen corresponding path program 1 times [2020-10-27 01:05:26,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:26,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982767831] [2020-10-27 01:05:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:27,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:05:27,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:27,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-27 01:05:27,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:05:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:27,310 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-27 01:05:27,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:27,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:27,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:27,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:27,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:27,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:27,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:27,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:27,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:27,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:27,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982767831] [2020-10-27 01:05:27,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:27,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:27,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030445045] [2020-10-27 01:05:27,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:27,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:27,330 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 9 states. [2020-10-27 01:05:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:28,012 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2020-10-27 01:05:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:28,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-27 01:05:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:28,016 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:05:28,016 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:05:28,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:05:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:05:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2020-10-27 01:05:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:05:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-27 01:05:28,037 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 34 [2020-10-27 01:05:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:28,037 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-27 01:05:28,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-27 01:05:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:05:28,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:28,040 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:28,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:05:28,040 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:28,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1293216844, now seen corresponding path program 2 times [2020-10-27 01:05:28,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:28,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187772458] [2020-10-27 01:05:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:28,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:28,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:28,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:05:28,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:28,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 01:05:28,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:28,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:28,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:28,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:05:28,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:28,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:28,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:28,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:28,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:28,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:28,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:28,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:28,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187772458] [2020-10-27 01:05:28,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:28,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:28,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980384908] [2020-10-27 01:05:28,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:28,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:28,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:28,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:28,418 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 9 states. [2020-10-27 01:05:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:28,806 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2020-10-27 01:05:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:28,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-27 01:05:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:28,809 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:05:28,809 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:05:28,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:05:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:05:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 01:05:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:05:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-27 01:05:28,821 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 37 [2020-10-27 01:05:28,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:28,822 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-27 01:05:28,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-27 01:05:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:05:28,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:28,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:28,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:05:28,825 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:28,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2057975726, now seen corresponding path program 1 times [2020-10-27 01:05:28,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:28,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832870594] [2020-10-27 01:05:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:28,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:29,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:05:29,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:29,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-27 01:05:29,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:29,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:05:29,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:29,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:29,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:29,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:29,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:29,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:29,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:29,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:29,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:29,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832870594] [2020-10-27 01:05:29,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:29,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:29,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756303995] [2020-10-27 01:05:29,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:29,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:29,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:29,373 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 10 states. [2020-10-27 01:05:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:30,084 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2020-10-27 01:05:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:05:30,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 01:05:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:30,086 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:05:30,086 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:05:30,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:05:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-27 01:05:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:05:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2020-10-27 01:05:30,104 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 37 [2020-10-27 01:05:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:30,104 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2020-10-27 01:05:30,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2020-10-27 01:05:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:05:30,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:30,105 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:30,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:05:30,106 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:30,107 INFO L82 PathProgramCache]: Analyzing trace with hash 92986550, now seen corresponding path program 2 times [2020-10-27 01:05:30,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:30,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664380765] [2020-10-27 01:05:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:31,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:05:31,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:31,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1182 [2020-10-27 01:05:31,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:31,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:05:31,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:31,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:31,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:31,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:31,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:31,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:31,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:31,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664380765] [2020-10-27 01:05:31,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:31,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:31,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844593212] [2020-10-27 01:05:31,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:31,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:31,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:31,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:31,609 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 10 states. [2020-10-27 01:05:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:32,278 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2020-10-27 01:05:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:32,279 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 01:05:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:32,279 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:05:32,280 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:05:32,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:05:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-10-27 01:05:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:05:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-10-27 01:05:32,288 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 37 [2020-10-27 01:05:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:32,288 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-10-27 01:05:32,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-10-27 01:05:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:05:32,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:32,289 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:32,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:05:32,289 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash -319241792, now seen corresponding path program 3 times [2020-10-27 01:05:32,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:32,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006434445] [2020-10-27 01:05:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:32,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:05:33,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:33,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-27 01:05:33,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:33,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:33,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:05:33,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006434445] [2020-10-27 01:05:33,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:33,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:33,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148534499] [2020-10-27 01:05:33,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:33,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:33,571 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 9 states. [2020-10-27 01:05:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:34,009 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2020-10-27 01:05:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:34,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-27 01:05:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:34,010 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:05:34,010 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:05:34,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:05:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-10-27 01:05:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:05:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-27 01:05:34,023 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 40 [2020-10-27 01:05:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:34,023 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-27 01:05:34,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-27 01:05:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:05:34,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:34,024 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:34,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:05:34,024 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:34,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1595693590, now seen corresponding path program 1 times [2020-10-27 01:05:34,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:34,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930855683] [2020-10-27 01:05:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:05:34,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-27 01:05:34,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:34,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:34,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:05:34,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:34,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:34,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:34,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930855683] [2020-10-27 01:05:34,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:34,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:34,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471962322] [2020-10-27 01:05:34,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:34,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:34,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:34,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:34,601 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 10 states. [2020-10-27 01:05:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:35,404 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2020-10-27 01:05:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:35,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-27 01:05:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:35,405 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:05:35,406 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:05:35,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:05:35,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 01:05:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:05:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-10-27 01:05:35,413 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 42 [2020-10-27 01:05:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:35,414 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-10-27 01:05:35,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-10-27 01:05:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:05:35,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:35,415 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:35,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:05:35,415 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1316952253, now seen corresponding path program 3 times [2020-10-27 01:05:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:35,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955683057] [2020-10-27 01:05:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:35,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:36,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:05:36,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:36,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-27 01:05:36,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:05:36,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:36,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:36,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:36,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:36,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:36,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:36,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:36,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:36,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:36,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:36,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:36,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955683057] [2020-10-27 01:05:36,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:36,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964760743] [2020-10-27 01:05:36,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:36,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:36,455 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 10 states. [2020-10-27 01:05:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:37,142 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-27 01:05:37,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:37,143 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-27 01:05:37,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:37,144 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:05:37,144 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:05:37,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:05:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2020-10-27 01:05:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:05:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-27 01:05:37,153 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 45 [2020-10-27 01:05:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:37,154 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-27 01:05:37,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-27 01:05:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:05:37,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:37,154 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:37,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:05:37,155 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash -771970409, now seen corresponding path program 1 times [2020-10-27 01:05:37,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:37,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440795955] [2020-10-27 01:05:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:37,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:39,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:05:39,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:39,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1885 [2020-10-27 01:05:39,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:05:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:39,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:39,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:39,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:39,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:39,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:39,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:39,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:39,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440795955] [2020-10-27 01:05:39,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:39,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636216355] [2020-10-27 01:05:39,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:39,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:39,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:39,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:39,377 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 9 states. [2020-10-27 01:05:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:39,842 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2020-10-27 01:05:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:39,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-27 01:05:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:39,843 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:05:39,843 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:05:39,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:05:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 01:05:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:05:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-27 01:05:39,874 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 45 [2020-10-27 01:05:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:39,874 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-27 01:05:39,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-27 01:05:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:05:39,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:39,875 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:39,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:05:39,876 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:39,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1378991867, now seen corresponding path program 1 times [2020-10-27 01:05:39,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:39,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097595113] [2020-10-27 01:05:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:40,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:41,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:05:41,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:41,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-27 01:05:41,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:05:41,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:41,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:41,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:41,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:41,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:41,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:41,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:41,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:41,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097595113] [2020-10-27 01:05:41,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:41,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:41,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591825872] [2020-10-27 01:05:41,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:41,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:41,529 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 10 states. [2020-10-27 01:05:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:42,139 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-10-27 01:05:42,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:42,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-27 01:05:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:42,140 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:05:42,140 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:05:42,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:05:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2020-10-27 01:05:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:05:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-27 01:05:42,148 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 45 [2020-10-27 01:05:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:42,149 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-27 01:05:42,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-27 01:05:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:05:42,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:42,150 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:42,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:05:42,150 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash 714678261, now seen corresponding path program 1 times [2020-10-27 01:05:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:42,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486356371] [2020-10-27 01:05:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:05:43,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:43,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 893 [2020-10-27 01:05:43,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:43,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:43,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:05:43,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:43,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:05:43,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:43,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486356371] [2020-10-27 01:05:43,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:43,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:43,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178741272] [2020-10-27 01:05:43,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:43,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:43,529 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 11 states. [2020-10-27 01:05:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:44,270 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-27 01:05:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:44,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 01:05:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:44,271 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:05:44,271 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:05:44,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:05:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:05:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-27 01:05:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:05:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-10-27 01:05:44,282 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 48 [2020-10-27 01:05:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:44,282 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-10-27 01:05:44,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:44,282 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-10-27 01:05:44,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:05:44,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:44,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:44,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:05:44,283 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1429326759, now seen corresponding path program 4 times [2020-10-27 01:05:44,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:44,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154210219] [2020-10-27 01:05:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:44,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:44,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:05:44,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:44,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-27 01:05:44,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:44,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:44,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:44,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:05:44,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:45,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:45,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:45,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:45,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154210219] [2020-10-27 01:05:45,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:45,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070200195] [2020-10-27 01:05:45,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:45,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:45,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:45,129 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 11 states. [2020-10-27 01:05:45,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:45,975 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2020-10-27 01:05:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:05:45,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 01:05:45,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:45,977 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:05:45,977 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:05:45,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:05:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2020-10-27 01:05:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:05:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-10-27 01:05:45,986 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 48 [2020-10-27 01:05:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:45,986 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-10-27 01:05:45,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-10-27 01:05:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:05:45,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:45,987 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:45,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:05:45,987 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2100881655, now seen corresponding path program 1 times [2020-10-27 01:05:45,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:45,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489151262] [2020-10-27 01:05:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:05:46,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:46,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-27 01:05:46,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:05:46,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:46,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:46,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:46,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:46,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:46,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:46,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:46,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489151262] [2020-10-27 01:05:46,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:46,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:46,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945967666] [2020-10-27 01:05:46,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:46,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:46,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:46,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:46,891 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 11 states. [2020-10-27 01:05:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:47,728 INFO L93 Difference]: Finished difference Result 137 states and 153 transitions. [2020-10-27 01:05:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:47,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 01:05:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:47,731 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:05:47,731 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 01:05:47,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 01:05:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2020-10-27 01:05:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:05:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-10-27 01:05:47,769 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 48 [2020-10-27 01:05:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:47,770 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-10-27 01:05:47,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-10-27 01:05:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:05:47,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:47,771 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:47,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:05:47,771 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash -43123365, now seen corresponding path program 2 times [2020-10-27 01:05:47,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:47,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44798644] [2020-10-27 01:05:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:47,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:48,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:05:48,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:48,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-27 01:05:48,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:05:48,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:48,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:48,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:48,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:48,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:48,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:48,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44798644] [2020-10-27 01:05:48,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:48,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:48,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315301189] [2020-10-27 01:05:48,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:48,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:48,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:48,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:48,535 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 11 states. [2020-10-27 01:05:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:49,992 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2020-10-27 01:05:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:05:49,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 01:05:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:49,996 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:05:49,996 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:05:49,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:05:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 126. [2020-10-27 01:05:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:05:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2020-10-27 01:05:50,009 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 48 [2020-10-27 01:05:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:50,010 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2020-10-27 01:05:50,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2020-10-27 01:05:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:05:50,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:50,011 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:50,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:05:50,011 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash -657129037, now seen corresponding path program 2 times [2020-10-27 01:05:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:50,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712560987] [2020-10-27 01:05:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:50,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:50,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:05:50,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:50,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-27 01:05:50,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:50,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:50,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:50,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:05:50,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:50,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:50,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:50,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:50,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:50,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:50,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:50,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:50,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:50,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712560987] [2020-10-27 01:05:50,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:50,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:05:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815795688] [2020-10-27 01:05:50,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:05:50,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:05:50,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:50,952 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 12 states. [2020-10-27 01:05:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:52,164 INFO L93 Difference]: Finished difference Result 176 states and 194 transitions. [2020-10-27 01:05:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:05:52,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-27 01:05:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:52,170 INFO L225 Difference]: With dead ends: 176 [2020-10-27 01:05:52,171 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 01:05:52,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:05:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 01:05:52,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2020-10-27 01:05:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 01:05:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2020-10-27 01:05:52,207 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 48 [2020-10-27 01:05:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:52,208 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2020-10-27 01:05:52,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:05:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2020-10-27 01:05:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:05:52,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:52,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:52,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:05:52,209 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1493833239, now seen corresponding path program 3 times [2020-10-27 01:05:52,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:52,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051893488] [2020-10-27 01:05:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:52,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:52,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:54,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:05:54,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:54,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2261 [2020-10-27 01:05:54,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:54,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:54,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:54,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:05:54,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:54,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:54,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:54,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:54,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:54,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:54,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:54,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:54,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:54,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:54,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:54,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051893488] [2020-10-27 01:05:54,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:54,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:54,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778206344] [2020-10-27 01:05:54,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:54,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:54,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:54,937 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand 11 states. [2020-10-27 01:05:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:56,239 INFO L93 Difference]: Finished difference Result 197 states and 218 transitions. [2020-10-27 01:05:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:05:56,240 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 01:05:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:56,242 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:05:56,243 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 01:05:56,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 01:05:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 152. [2020-10-27 01:05:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 01:05:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2020-10-27 01:05:56,259 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 48 [2020-10-27 01:05:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:56,259 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2020-10-27 01:05:56,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2020-10-27 01:05:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:05:56,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:56,261 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:56,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:05:56,263 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 729074357, now seen corresponding path program 2 times [2020-10-27 01:05:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:56,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589543578] [2020-10-27 01:05:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:56,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:57,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:05:57,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:57,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-27 01:05:57,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:05:57,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:57,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:57,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:57,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:57,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:57,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:05:57,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:57,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:57,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589543578] [2020-10-27 01:05:57,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:57,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:05:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920884467] [2020-10-27 01:05:57,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:05:57,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:05:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:57,346 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand 12 states. [2020-10-27 01:05:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:58,601 INFO L93 Difference]: Finished difference Result 197 states and 217 transitions. [2020-10-27 01:05:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:58,603 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-27 01:05:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:58,604 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:05:58,605 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 01:05:58,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 01:05:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2020-10-27 01:05:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 01:05:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 188 transitions. [2020-10-27 01:05:58,618 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 188 transitions. Word has length 48 [2020-10-27 01:05:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:58,618 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 188 transitions. [2020-10-27 01:05:58,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:05:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 188 transitions. [2020-10-27 01:05:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:05:58,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:58,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:58,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:05:58,623 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:58,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1414930663, now seen corresponding path program 4 times [2020-10-27 01:05:58,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:58,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725569553] [2020-10-27 01:05:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:58,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:02,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:06:02,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:02,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3405 [2020-10-27 01:06:02,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:02,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:06:02,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:02,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:02,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:02,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:02,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:02,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:02,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725569553] [2020-10-27 01:06:02,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:02,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:02,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633800506] [2020-10-27 01:06:02,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:02,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:02,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:02,367 INFO L87 Difference]: Start difference. First operand 173 states and 188 transitions. Second operand 10 states. [2020-10-27 01:06:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:03,025 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2020-10-27 01:06:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:03,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-27 01:06:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:03,027 INFO L225 Difference]: With dead ends: 202 [2020-10-27 01:06:03,027 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 01:06:03,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 01:06:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 157. [2020-10-27 01:06:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 01:06:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2020-10-27 01:06:03,039 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 48 [2020-10-27 01:06:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:03,039 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2020-10-27 01:06:03,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2020-10-27 01:06:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:06:03,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:03,041 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:03,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:06:03,041 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:03,042 INFO L82 PathProgramCache]: Analyzing trace with hash -995351747, now seen corresponding path program 5 times [2020-10-27 01:06:03,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:03,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013295455] [2020-10-27 01:06:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:03,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:03,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:06:03,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:03,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-27 01:06:03,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:03,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:03,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:03,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:06:03,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:03,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:03,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:03,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:03,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013295455] [2020-10-27 01:06:03,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:03,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:03,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395659411] [2020-10-27 01:06:03,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:03,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:03,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:03,655 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand 11 states. [2020-10-27 01:06:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:04,463 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2020-10-27 01:06:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:04,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-27 01:06:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:04,469 INFO L225 Difference]: With dead ends: 177 [2020-10-27 01:06:04,469 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:06:04,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:06:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:06:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-27 01:06:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:06:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2020-10-27 01:06:04,479 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 51 [2020-10-27 01:06:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:04,479 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2020-10-27 01:06:04,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2020-10-27 01:06:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:06:04,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:04,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:04,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:06:04,480 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1423412887, now seen corresponding path program 3 times [2020-10-27 01:06:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:04,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370021059] [2020-10-27 01:06:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:04,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:05,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:06:05,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:05,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-27 01:06:05,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:05,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:05,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:05,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:06:05,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:05,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:05,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:05,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:05,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:05,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:05,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:05,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:05,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:05,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:05,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:05,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370021059] [2020-10-27 01:06:05,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:05,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897123976] [2020-10-27 01:06:05,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:05,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:05,311 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 12 states. [2020-10-27 01:06:06,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:06,351 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2020-10-27 01:06:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:06:06,351 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 01:06:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:06,352 INFO L225 Difference]: With dead ends: 171 [2020-10-27 01:06:06,353 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:06:06,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:06:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2020-10-27 01:06:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:06:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2020-10-27 01:06:06,368 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 51 [2020-10-27 01:06:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:06,368 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2020-10-27 01:06:06,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2020-10-27 01:06:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:06:06,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:06,369 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:06,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:06:06,370 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:06,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash -720592133, now seen corresponding path program 4 times [2020-10-27 01:06:06,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:06,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840685752] [2020-10-27 01:06:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:06,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:06,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:08,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:06:08,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-10-27 01:06:08,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:08,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:08,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:08,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:06:08,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:08,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:08,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:08,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:08,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:08,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:08,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:08,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:08,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:08,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840685752] [2020-10-27 01:06:08,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:08,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:08,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853661796] [2020-10-27 01:06:08,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:08,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:08,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:08,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:08,333 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 12 states. [2020-10-27 01:06:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:09,355 INFO L93 Difference]: Finished difference Result 180 states and 198 transitions. [2020-10-27 01:06:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:06:09,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 01:06:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:09,357 INFO L225 Difference]: With dead ends: 180 [2020-10-27 01:06:09,357 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:06:09,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:06:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2020-10-27 01:06:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:06:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2020-10-27 01:06:09,370 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 51 [2020-10-27 01:06:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:09,371 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2020-10-27 01:06:09,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2020-10-27 01:06:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:06:09,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:09,372 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:09,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:06:09,372 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:09,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1287574869, now seen corresponding path program 1 times [2020-10-27 01:06:09,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:09,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688271505] [2020-10-27 01:06:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:09,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:10,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:06:10,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:10,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 740 [2020-10-27 01:06:10,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:06:10,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:10,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:10,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:10,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:10,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:10,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:10,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:10,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:10,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688271505] [2020-10-27 01:06:10,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:10,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225525370] [2020-10-27 01:06:10,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:10,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:10,574 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 13 states. [2020-10-27 01:06:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:11,977 INFO L93 Difference]: Finished difference Result 251 states and 276 transitions. [2020-10-27 01:06:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:06:11,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-27 01:06:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:11,981 INFO L225 Difference]: With dead ends: 251 [2020-10-27 01:06:11,981 INFO L226 Difference]: Without dead ends: 238 [2020-10-27 01:06:11,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:06:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-27 01:06:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 199. [2020-10-27 01:06:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 01:06:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 215 transitions. [2020-10-27 01:06:11,994 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 215 transitions. Word has length 53 [2020-10-27 01:06:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:11,994 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 215 transitions. [2020-10-27 01:06:11,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 215 transitions. [2020-10-27 01:06:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:06:11,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:11,995 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:11,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:06:11,996 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash -956408429, now seen corresponding path program 2 times [2020-10-27 01:06:11,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:11,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291121008] [2020-10-27 01:06:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:12,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:06:12,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:12,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-27 01:06:12,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:12,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:12,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:06:12,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:13,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:13,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:13,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:13,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:13,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:13,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:13,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:13,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:13,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291121008] [2020-10-27 01:06:13,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:13,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:13,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363341600] [2020-10-27 01:06:13,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:13,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:13,240 INFO L87 Difference]: Start difference. First operand 199 states and 215 transitions. Second operand 13 states. [2020-10-27 01:06:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:15,141 INFO L93 Difference]: Finished difference Result 274 states and 304 transitions. [2020-10-27 01:06:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:15,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-27 01:06:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:15,144 INFO L225 Difference]: With dead ends: 274 [2020-10-27 01:06:15,144 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 01:06:15,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:06:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 01:06:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 231. [2020-10-27 01:06:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 01:06:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 250 transitions. [2020-10-27 01:06:15,161 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 250 transitions. Word has length 53 [2020-10-27 01:06:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:15,161 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 250 transitions. [2020-10-27 01:06:15,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 250 transitions. [2020-10-27 01:06:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:06:15,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:15,163 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:15,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:06:15,163 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:15,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1141335717, now seen corresponding path program 5 times [2020-10-27 01:06:15,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:15,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879769697] [2020-10-27 01:06:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:15,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:06:16,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:16,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1496 [2020-10-27 01:06:16,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:16,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:06:16,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:17,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:17,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:17,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:17,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:17,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:17,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:17,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:17,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:17,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:17,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:17,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879769697] [2020-10-27 01:06:17,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:17,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:17,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395739048] [2020-10-27 01:06:17,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:17,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:17,084 INFO L87 Difference]: Start difference. First operand 231 states and 250 transitions. Second operand 12 states. [2020-10-27 01:06:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:18,566 INFO L93 Difference]: Finished difference Result 250 states and 271 transitions. [2020-10-27 01:06:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:18,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-27 01:06:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:18,568 INFO L225 Difference]: With dead ends: 250 [2020-10-27 01:06:18,568 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 01:06:18,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 01:06:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-10-27 01:06:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 01:06:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 230 transitions. [2020-10-27 01:06:18,583 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 230 transitions. Word has length 54 [2020-10-27 01:06:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:18,584 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 230 transitions. [2020-10-27 01:06:18,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 230 transitions. [2020-10-27 01:06:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:06:18,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:18,585 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:18,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:06:18,585 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash -437645119, now seen corresponding path program 2 times [2020-10-27 01:06:18,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:18,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067748920] [2020-10-27 01:06:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:18,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:19,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:06:19,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:19,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-27 01:06:19,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:06:19,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:19,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:19,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:19,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:19,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:19,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:19,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:19,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067748920] [2020-10-27 01:06:19,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:19,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:19,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826363755] [2020-10-27 01:06:19,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:19,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:19,666 INFO L87 Difference]: Start difference. First operand 213 states and 230 transitions. Second operand 13 states. [2020-10-27 01:06:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:21,083 INFO L93 Difference]: Finished difference Result 237 states and 257 transitions. [2020-10-27 01:06:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:06:21,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-27 01:06:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:21,085 INFO L225 Difference]: With dead ends: 237 [2020-10-27 01:06:21,085 INFO L226 Difference]: Without dead ends: 202 [2020-10-27 01:06:21,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:06:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-27 01:06:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2020-10-27 01:06:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 01:06:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 216 transitions. [2020-10-27 01:06:21,103 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 216 transitions. Word has length 56 [2020-10-27 01:06:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:21,104 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 216 transitions. [2020-10-27 01:06:21,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 216 transitions. [2020-10-27 01:06:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:06:21,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:21,105 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:21,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:06:21,105 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1929075873, now seen corresponding path program 1 times [2020-10-27 01:06:21,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:21,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957507147] [2020-10-27 01:06:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:21,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:22,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:06:22,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:22,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-27 01:06:22,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:06:22,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:22,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:22,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:22,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:22,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:22,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:22,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:22,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:22,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:22,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:22,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:22,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957507147] [2020-10-27 01:06:22,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:22,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:22,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539008148] [2020-10-27 01:06:22,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:22,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:22,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:22,654 INFO L87 Difference]: Start difference. First operand 201 states and 216 transitions. Second operand 14 states. [2020-10-27 01:06:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:24,619 INFO L93 Difference]: Finished difference Result 231 states and 252 transitions. [2020-10-27 01:06:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:24,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-27 01:06:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:24,621 INFO L225 Difference]: With dead ends: 231 [2020-10-27 01:06:24,621 INFO L226 Difference]: Without dead ends: 227 [2020-10-27 01:06:24,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:06:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-27 01:06:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 205. [2020-10-27 01:06:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-27 01:06:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 220 transitions. [2020-10-27 01:06:24,638 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 220 transitions. Word has length 56 [2020-10-27 01:06:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:24,639 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 220 transitions. [2020-10-27 01:06:24,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 220 transitions. [2020-10-27 01:06:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:06:24,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:24,640 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:24,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:06:24,640 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash 221886403, now seen corresponding path program 3 times [2020-10-27 01:06:24,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:24,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908659401] [2020-10-27 01:06:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:24,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2452 [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:06:27,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:27,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:27,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:27,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:27,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:27,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:27,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:27,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:27,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:27,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:27,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908659401] [2020-10-27 01:06:27,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:27,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163486773] [2020-10-27 01:06:27,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:27,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:27,713 INFO L87 Difference]: Start difference. First operand 205 states and 220 transitions. Second operand 14 states. [2020-10-27 01:06:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:29,533 INFO L93 Difference]: Finished difference Result 241 states and 264 transitions. [2020-10-27 01:06:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:06:29,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-27 01:06:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:29,536 INFO L225 Difference]: With dead ends: 241 [2020-10-27 01:06:29,536 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 01:06:29,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:06:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 01:06:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2020-10-27 01:06:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-27 01:06:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 227 transitions. [2020-10-27 01:06:29,555 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 227 transitions. Word has length 56 [2020-10-27 01:06:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:29,555 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 227 transitions. [2020-10-27 01:06:29,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 227 transitions. [2020-10-27 01:06:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:06:29,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:29,556 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:29,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:06:29,557 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1943434134, now seen corresponding path program 6 times [2020-10-27 01:06:29,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:29,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741213556] [2020-10-27 01:06:29,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:29,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:30,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:31,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:06:31,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:31,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1485 [2020-10-27 01:06:31,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:31,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:31,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:31,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:06:31,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:31,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:31,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:31,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:31,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:31,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:31,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:31,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:31,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741213556] [2020-10-27 01:06:31,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:31,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:31,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149183344] [2020-10-27 01:06:31,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:31,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:31,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:31,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:31,490 INFO L87 Difference]: Start difference. First operand 210 states and 227 transitions. Second operand 12 states. [2020-10-27 01:06:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:32,624 INFO L93 Difference]: Finished difference Result 235 states and 256 transitions. [2020-10-27 01:06:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:32,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-27 01:06:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:32,626 INFO L225 Difference]: With dead ends: 235 [2020-10-27 01:06:32,626 INFO L226 Difference]: Without dead ends: 231 [2020-10-27 01:06:32,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-27 01:06:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 216. [2020-10-27 01:06:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-27 01:06:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 233 transitions. [2020-10-27 01:06:32,641 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 233 transitions. Word has length 59 [2020-10-27 01:06:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:32,641 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 233 transitions. [2020-10-27 01:06:32,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 233 transitions. [2020-10-27 01:06:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:06:32,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:32,643 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:32,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:06:32,643 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash 672649650, now seen corresponding path program 4 times [2020-10-27 01:06:32,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:32,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364763229] [2020-10-27 01:06:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:33,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:06:33,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-27 01:06:33,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:06:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:34,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:34,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:34,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:34,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:34,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:34,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364763229] [2020-10-27 01:06:34,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:34,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:34,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88044835] [2020-10-27 01:06:34,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:34,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:34,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:34,576 INFO L87 Difference]: Start difference. First operand 216 states and 233 transitions. Second operand 13 states. [2020-10-27 01:06:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:36,403 INFO L93 Difference]: Finished difference Result 279 states and 303 transitions. [2020-10-27 01:06:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:36,404 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-27 01:06:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:36,406 INFO L225 Difference]: With dead ends: 279 [2020-10-27 01:06:36,407 INFO L226 Difference]: Without dead ends: 275 [2020-10-27 01:06:36,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:06:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-27 01:06:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 238. [2020-10-27 01:06:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-27 01:06:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 257 transitions. [2020-10-27 01:06:36,445 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 257 transitions. Word has length 59 [2020-10-27 01:06:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:36,445 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 257 transitions. [2020-10-27 01:06:36,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 257 transitions. [2020-10-27 01:06:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:06:36,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:36,447 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:36,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:06:36,447 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2058853044, now seen corresponding path program 5 times [2020-10-27 01:06:36,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:36,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534173390] [2020-10-27 01:06:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:36,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:37,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:37,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:06:37,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:37,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-27 01:06:37,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:37,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:37,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:37,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:06:37,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:38,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:38,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:38,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:38,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:38,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:38,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:38,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:38,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:38,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:38,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:38,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534173390] [2020-10-27 01:06:38,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:38,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:38,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62585702] [2020-10-27 01:06:38,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:38,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:38,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:38,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:38,429 INFO L87 Difference]: Start difference. First operand 238 states and 257 transitions. Second operand 13 states. [2020-10-27 01:06:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:39,860 INFO L93 Difference]: Finished difference Result 283 states and 307 transitions. [2020-10-27 01:06:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:06:39,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-27 01:06:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:39,863 INFO L225 Difference]: With dead ends: 283 [2020-10-27 01:06:39,863 INFO L226 Difference]: Without dead ends: 279 [2020-10-27 01:06:39,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:06:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-27 01:06:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 216. [2020-10-27 01:06:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-27 01:06:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 233 transitions. [2020-10-27 01:06:39,887 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 233 transitions. Word has length 59 [2020-10-27 01:06:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:39,887 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 233 transitions. [2020-10-27 01:06:39,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 233 transitions. [2020-10-27 01:06:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:06:39,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:39,889 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:39,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:06:39,889 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:39,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash 35516307, now seen corresponding path program 4 times [2020-10-27 01:06:39,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:39,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605644805] [2020-10-27 01:06:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:39,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:40,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:42,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:42,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:06:42,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:42,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2667 [2020-10-27 01:06:42,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:42,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:42,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:42,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:06:42,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:43,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:43,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:43,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:43,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:43,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:43,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:43,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:43,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:43,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:43,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605644805] [2020-10-27 01:06:43,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:43,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:43,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461077853] [2020-10-27 01:06:43,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:43,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:43,088 INFO L87 Difference]: Start difference. First operand 216 states and 233 transitions. Second operand 14 states. [2020-10-27 01:06:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:45,165 INFO L93 Difference]: Finished difference Result 240 states and 261 transitions. [2020-10-27 01:06:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:45,166 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-27 01:06:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:45,168 INFO L225 Difference]: With dead ends: 240 [2020-10-27 01:06:45,168 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 01:06:45,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:06:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 01:06:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 155. [2020-10-27 01:06:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:06:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2020-10-27 01:06:45,183 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 59 [2020-10-27 01:06:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:45,183 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2020-10-27 01:06:45,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2020-10-27 01:06:45,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:06:45,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:45,184 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:45,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:06:45,185 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:45,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1966232898, now seen corresponding path program 2 times [2020-10-27 01:06:45,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:45,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710428878] [2020-10-27 01:06:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:06:46,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:46,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1163 [2020-10-27 01:06:46,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:06:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:06:46,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:46,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:46,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:46,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:46,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:46,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:46,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:46,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:46,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710428878] [2020-10-27 01:06:46,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:46,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:46,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885339249] [2020-10-27 01:06:46,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:46,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:46,768 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 13 states. [2020-10-27 01:06:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:47,958 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2020-10-27 01:06:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:06:47,959 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-27 01:06:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:47,960 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:06:47,960 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 01:06:47,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:06:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 01:06:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 155. [2020-10-27 01:06:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:06:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 167 transitions. [2020-10-27 01:06:47,974 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 167 transitions. Word has length 62 [2020-10-27 01:06:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:47,974 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 167 transitions. [2020-10-27 01:06:47,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 167 transitions. [2020-10-27 01:06:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:06:47,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:47,975 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:47,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:06:47,975 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1691473284, now seen corresponding path program 6 times [2020-10-27 01:06:47,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:47,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736314539] [2020-10-27 01:06:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:48,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:48,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:06:48,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:48,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-27 01:06:48,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:48,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:48,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:48,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:06:48,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:49,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:49,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:49,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:49,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:49,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:49,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:49,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:49,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:49,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:49,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736314539] [2020-10-27 01:06:49,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:49,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:49,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098593604] [2020-10-27 01:06:49,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:49,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:49,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:49,597 INFO L87 Difference]: Start difference. First operand 155 states and 167 transitions. Second operand 13 states. [2020-10-27 01:06:51,050 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 01:06:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:51,741 INFO L93 Difference]: Finished difference Result 248 states and 270 transitions. [2020-10-27 01:06:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:51,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-27 01:06:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:51,744 INFO L225 Difference]: With dead ends: 248 [2020-10-27 01:06:51,744 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 01:06:51,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:06:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 01:06:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 162. [2020-10-27 01:06:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 01:06:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 175 transitions. [2020-10-27 01:06:51,758 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 175 transitions. Word has length 62 [2020-10-27 01:06:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:51,759 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 175 transitions. [2020-10-27 01:06:51,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 175 transitions. [2020-10-27 01:06:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:06:51,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:51,760 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:51,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:06:51,760 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1431341120, now seen corresponding path program 7 times [2020-10-27 01:06:51,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:51,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169880564] [2020-10-27 01:06:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:51,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:52,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:52,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:06:52,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:52,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-27 01:06:52,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:06:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:52,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:06:52,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:53,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:53,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:53,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:53,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:53,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:53,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:53,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:53,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169880564] [2020-10-27 01:06:53,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:53,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:53,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815456039] [2020-10-27 01:06:53,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:53,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:53,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:53,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:53,280 INFO L87 Difference]: Start difference. First operand 162 states and 175 transitions. Second operand 14 states. [2020-10-27 01:06:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:55,291 INFO L93 Difference]: Finished difference Result 230 states and 250 transitions. [2020-10-27 01:06:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:06:55,292 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 01:06:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:55,293 INFO L225 Difference]: With dead ends: 230 [2020-10-27 01:06:55,293 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 01:06:55,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:06:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 01:06:55,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 187. [2020-10-27 01:06:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 01:06:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2020-10-27 01:06:55,312 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 62 [2020-10-27 01:06:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:55,312 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2020-10-27 01:06:55,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2020-10-27 01:06:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:06:55,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:55,314 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:55,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:06:55,314 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash -712663900, now seen corresponding path program 7 times [2020-10-27 01:06:55,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:55,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947174285] [2020-10-27 01:06:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:58,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:06:58,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:58,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3067 [2020-10-27 01:06:58,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:58,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:06:58,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:58,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:06:58,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:58,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:58,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:58,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:58,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:58,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:58,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:58,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947174285] [2020-10-27 01:06:58,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:58,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:58,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529919928] [2020-10-27 01:06:58,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:58,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:58,925 INFO L87 Difference]: Start difference. First operand 187 states and 203 transitions. Second operand 14 states. [2020-10-27 01:07:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:00,675 INFO L93 Difference]: Finished difference Result 291 states and 317 transitions. [2020-10-27 01:07:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:07:00,676 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 01:07:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:00,677 INFO L225 Difference]: With dead ends: 291 [2020-10-27 01:07:00,677 INFO L226 Difference]: Without dead ends: 287 [2020-10-27 01:07:00,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:07:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-27 01:07:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 254. [2020-10-27 01:07:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 01:07:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 274 transitions. [2020-10-27 01:07:00,697 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 274 transitions. Word has length 62 [2020-10-27 01:07:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:00,697 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 274 transitions. [2020-10-27 01:07:00,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 274 transitions. [2020-10-27 01:07:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:07:00,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:00,698 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:00,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:07:00,699 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:00,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:00,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1706100734, now seen corresponding path program 8 times [2020-10-27 01:07:00,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:00,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689894873] [2020-10-27 01:07:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:00,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:01,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:07:01,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:01,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-27 01:07:01,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:01,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:01,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:01,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:07:01,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:02,394 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 01:07:02,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:02,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689894873] [2020-10-27 01:07:02,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:02,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:02,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341485422] [2020-10-27 01:07:02,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:02,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:02,609 INFO L87 Difference]: Start difference. First operand 254 states and 274 transitions. Second operand 14 states. [2020-10-27 01:07:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:04,378 INFO L93 Difference]: Finished difference Result 310 states and 338 transitions. [2020-10-27 01:07:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:07:04,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 01:07:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:04,381 INFO L225 Difference]: With dead ends: 310 [2020-10-27 01:07:04,381 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 01:07:04,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 01:07:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 278. [2020-10-27 01:07:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-27 01:07:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 300 transitions. [2020-10-27 01:07:04,403 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 300 transitions. Word has length 62 [2020-10-27 01:07:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:04,404 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 300 transitions. [2020-10-27 01:07:04,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 300 transitions. [2020-10-27 01:07:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:07:04,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:04,405 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:04,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:07:04,405 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:04,406 INFO L82 PathProgramCache]: Analyzing trace with hash -437904286, now seen corresponding path program 8 times [2020-10-27 01:07:04,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:04,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788636098] [2020-10-27 01:07:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:04,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:07,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:07,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:07:07,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3214 [2020-10-27 01:07:07,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:07:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:08,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:08,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:08,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:08,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:08,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788636098] [2020-10-27 01:07:08,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:08,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:08,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097091438] [2020-10-27 01:07:08,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:08,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:08,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:08,253 INFO L87 Difference]: Start difference. First operand 278 states and 300 transitions. Second operand 14 states. [2020-10-27 01:07:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:10,131 INFO L93 Difference]: Finished difference Result 314 states and 341 transitions. [2020-10-27 01:07:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:10,132 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 01:07:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:10,134 INFO L225 Difference]: With dead ends: 314 [2020-10-27 01:07:10,134 INFO L226 Difference]: Without dead ends: 310 [2020-10-27 01:07:10,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:07:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-27 01:07:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 195. [2020-10-27 01:07:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 01:07:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 212 transitions. [2020-10-27 01:07:10,152 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 212 transitions. Word has length 62 [2020-10-27 01:07:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:10,152 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 212 transitions. [2020-10-27 01:07:10,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 212 transitions. [2020-10-27 01:07:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:07:10,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:10,154 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:10,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:07:10,154 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash 969457326, now seen corresponding path program 9 times [2020-10-27 01:07:10,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:10,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030770519] [2020-10-27 01:07:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:10,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:10,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:15,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:07:15,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:15,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4923 [2020-10-27 01:07:15,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:15,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:15,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:15,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:07:15,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:15,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:15,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:15,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:15,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:15,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:15,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:15,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:15,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:15,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030770519] [2020-10-27 01:07:15,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:15,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654148144] [2020-10-27 01:07:15,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:15,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:15,814 INFO L87 Difference]: Start difference. First operand 195 states and 212 transitions. Second operand 14 states. [2020-10-27 01:07:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:17,438 INFO L93 Difference]: Finished difference Result 272 states and 297 transitions. [2020-10-27 01:07:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:17,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-27 01:07:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:17,442 INFO L225 Difference]: With dead ends: 272 [2020-10-27 01:07:17,442 INFO L226 Difference]: Without dead ends: 258 [2020-10-27 01:07:17,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:07:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-27 01:07:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2020-10-27 01:07:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 01:07:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 241 transitions. [2020-10-27 01:07:17,459 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 241 transitions. Word has length 65 [2020-10-27 01:07:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:17,459 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 241 transitions. [2020-10-27 01:07:17,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 241 transitions. [2020-10-27 01:07:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:07:17,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:17,460 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:17,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:07:17,461 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1174547694, now seen corresponding path program 9 times [2020-10-27 01:07:17,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:17,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262044201] [2020-10-27 01:07:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:17,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:18,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:19,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:19,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:07:19,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1783 [2020-10-27 01:07:19,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:07:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:19,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:19,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:19,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:19,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:19,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:19,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:19,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:19,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:19,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:19,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:19,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:20,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262044201] [2020-10-27 01:07:20,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:20,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:20,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603205068] [2020-10-27 01:07:20,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:20,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:20,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:20,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:20,025 INFO L87 Difference]: Start difference. First operand 222 states and 241 transitions. Second operand 15 states. [2020-10-27 01:07:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:22,077 INFO L93 Difference]: Finished difference Result 335 states and 366 transitions. [2020-10-27 01:07:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:07:22,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-27 01:07:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:22,080 INFO L225 Difference]: With dead ends: 335 [2020-10-27 01:07:22,080 INFO L226 Difference]: Without dead ends: 322 [2020-10-27 01:07:22,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:07:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-27 01:07:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 305. [2020-10-27 01:07:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-27 01:07:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 329 transitions. [2020-10-27 01:07:22,104 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 329 transitions. Word has length 65 [2020-10-27 01:07:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:22,104 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 329 transitions. [2020-10-27 01:07:22,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 329 transitions. [2020-10-27 01:07:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:07:22,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:22,105 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:22,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:07:22,106 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:22,106 INFO L82 PathProgramCache]: Analyzing trace with hash 125451824, now seen corresponding path program 10 times [2020-10-27 01:07:22,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:22,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254277081] [2020-10-27 01:07:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:22,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:25,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:07:25,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:25,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3171 [2020-10-27 01:07:25,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:25,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:07:25,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:26,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:26,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:26,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:26,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:26,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:26,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:26,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:26,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:26,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:26,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254277081] [2020-10-27 01:07:26,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:26,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:26,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569500702] [2020-10-27 01:07:26,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:26,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:26,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:26,109 INFO L87 Difference]: Start difference. First operand 305 states and 329 transitions. Second operand 14 states. [2020-10-27 01:07:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:27,665 INFO L93 Difference]: Finished difference Result 338 states and 369 transitions. [2020-10-27 01:07:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:27,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-27 01:07:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:27,668 INFO L225 Difference]: With dead ends: 338 [2020-10-27 01:07:27,668 INFO L226 Difference]: Without dead ends: 324 [2020-10-27 01:07:27,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-27 01:07:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 305. [2020-10-27 01:07:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-27 01:07:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 329 transitions. [2020-10-27 01:07:27,689 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 329 transitions. Word has length 65 [2020-10-27 01:07:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:27,689 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 329 transitions. [2020-10-27 01:07:27,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 329 transitions. [2020-10-27 01:07:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:07:27,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:27,690 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:27,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:07:27,690 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2018553196, now seen corresponding path program 10 times [2020-10-27 01:07:27,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:27,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775544007] [2020-10-27 01:07:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:27,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:30,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:30,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:07:30,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:30,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2652 [2020-10-27 01:07:30,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:07:30,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:30,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:30,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:07:30,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775544007] [2020-10-27 01:07:30,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:30,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:30,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125703485] [2020-10-27 01:07:30,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:30,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:30,765 INFO L87 Difference]: Start difference. First operand 305 states and 329 transitions. Second operand 12 states. [2020-10-27 01:07:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:31,871 INFO L93 Difference]: Finished difference Result 339 states and 369 transitions. [2020-10-27 01:07:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:31,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-27 01:07:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:31,874 INFO L225 Difference]: With dead ends: 339 [2020-10-27 01:07:31,874 INFO L226 Difference]: Without dead ends: 316 [2020-10-27 01:07:31,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-27 01:07:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 302. [2020-10-27 01:07:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-27 01:07:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 323 transitions. [2020-10-27 01:07:31,897 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 323 transitions. Word has length 65 [2020-10-27 01:07:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:31,898 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 323 transitions. [2020-10-27 01:07:31,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 323 transitions. [2020-10-27 01:07:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:31,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:31,899 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:31,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:07:31,899 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash 645006826, now seen corresponding path program 3 times [2020-10-27 01:07:31,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:31,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938102744] [2020-10-27 01:07:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:33,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:33,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:33,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:33,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-27 01:07:33,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:33,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:33,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:33,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:07:33,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:33,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:33,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:33,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:33,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:33,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:33,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:33,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:33,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938102744] [2020-10-27 01:07:33,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:33,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:33,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767598961] [2020-10-27 01:07:33,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:33,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:33,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:33,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:33,758 INFO L87 Difference]: Start difference. First operand 302 states and 323 transitions. Second operand 15 states. [2020-10-27 01:07:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:36,435 INFO L93 Difference]: Finished difference Result 399 states and 434 transitions. [2020-10-27 01:07:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:07:36,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-27 01:07:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:36,438 INFO L225 Difference]: With dead ends: 399 [2020-10-27 01:07:36,438 INFO L226 Difference]: Without dead ends: 395 [2020-10-27 01:07:36,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:07:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-27 01:07:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 346. [2020-10-27 01:07:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-27 01:07:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 370 transitions. [2020-10-27 01:07:36,467 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 370 transitions. Word has length 67 [2020-10-27 01:07:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:36,467 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 370 transitions. [2020-10-27 01:07:36,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:36,467 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 370 transitions. [2020-10-27 01:07:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:36,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:36,468 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:36,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:07:36,469 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:36,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1491295580, now seen corresponding path program 1 times [2020-10-27 01:07:36,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:36,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894229702] [2020-10-27 01:07:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:36,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:37,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:38,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:38,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:38,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:38,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2102 [2020-10-27 01:07:38,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:38,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:38,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:38,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:07:38,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:39,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:39,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:39,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:39,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:39,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:39,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:39,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:39,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:39,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894229702] [2020-10-27 01:07:39,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:39,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661269793] [2020-10-27 01:07:39,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:39,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:39,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:39,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:39,229 INFO L87 Difference]: Start difference. First operand 346 states and 370 transitions. Second operand 15 states. [2020-10-27 01:07:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:41,330 INFO L93 Difference]: Finished difference Result 366 states and 393 transitions. [2020-10-27 01:07:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:07:41,332 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-27 01:07:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:41,334 INFO L225 Difference]: With dead ends: 366 [2020-10-27 01:07:41,334 INFO L226 Difference]: Without dead ends: 362 [2020-10-27 01:07:41,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:07:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-27 01:07:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 350. [2020-10-27 01:07:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-27 01:07:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 374 transitions. [2020-10-27 01:07:41,362 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 374 transitions. Word has length 67 [2020-10-27 01:07:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:41,362 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 374 transitions. [2020-10-27 01:07:41,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 374 transitions. [2020-10-27 01:07:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:41,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:41,364 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:41,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:07:41,364 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:41,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2144140194, now seen corresponding path program 2 times [2020-10-27 01:07:41,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:41,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623693191] [2020-10-27 01:07:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:41,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1521 [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:07:43,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:43,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:43,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:43,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:43,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:43,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:43,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:43,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:43,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:43,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:43,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:43,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:43,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623693191] [2020-10-27 01:07:43,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:43,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:43,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313836516] [2020-10-27 01:07:43,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:43,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:43,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:43,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:43,683 INFO L87 Difference]: Start difference. First operand 350 states and 374 transitions. Second operand 15 states. [2020-10-27 01:07:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:45,740 INFO L93 Difference]: Finished difference Result 483 states and 522 transitions. [2020-10-27 01:07:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:07:45,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-27 01:07:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:45,744 INFO L225 Difference]: With dead ends: 483 [2020-10-27 01:07:45,744 INFO L226 Difference]: Without dead ends: 465 [2020-10-27 01:07:45,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-27 01:07:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 372. [2020-10-27 01:07:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-27 01:07:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 398 transitions. [2020-10-27 01:07:45,766 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 398 transitions. Word has length 67 [2020-10-27 01:07:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:45,766 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 398 transitions. [2020-10-27 01:07:45,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 398 transitions. [2020-10-27 01:07:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:45,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:45,768 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:45,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:07:45,768 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:45,769 INFO L82 PathProgramCache]: Analyzing trace with hash -864509670, now seen corresponding path program 3 times [2020-10-27 01:07:45,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:45,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703421913] [2020-10-27 01:07:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:45,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:47,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:47,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:47,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:47,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1637 [2020-10-27 01:07:47,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:47,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:47,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:47,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:07:47,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:47,783 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-27 01:07:48,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:48,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:48,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:48,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:48,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:48,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:48,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:48,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703421913] [2020-10-27 01:07:48,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:48,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:07:48,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911720928] [2020-10-27 01:07:48,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:07:48,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:07:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:48,139 INFO L87 Difference]: Start difference. First operand 372 states and 398 transitions. Second operand 16 states. [2020-10-27 01:07:50,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:50,689 INFO L93 Difference]: Finished difference Result 471 states and 506 transitions. [2020-10-27 01:07:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:50,690 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-27 01:07:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:50,693 INFO L225 Difference]: With dead ends: 471 [2020-10-27 01:07:50,693 INFO L226 Difference]: Without dead ends: 467 [2020-10-27 01:07:50,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:07:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-27 01:07:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 431. [2020-10-27 01:07:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-10-27 01:07:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 462 transitions. [2020-10-27 01:07:50,722 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 462 transitions. Word has length 67 [2020-10-27 01:07:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:50,722 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 462 transitions. [2020-10-27 01:07:50,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:07:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 462 transitions. [2020-10-27 01:07:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:50,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:50,723 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:50,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:07:50,724 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:50,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1286452606, now seen corresponding path program 4 times [2020-10-27 01:07:50,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:50,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799040660] [2020-10-27 01:07:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:50,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:53,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:53,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:53,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:53,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3096 [2020-10-27 01:07:53,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:53,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:53,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:53,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:07:53,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:54,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:54,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:54,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:54,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:54,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:07:54,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:54,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:54,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:54,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799040660] [2020-10-27 01:07:54,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:54,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:07:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538437075] [2020-10-27 01:07:54,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:07:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:07:54,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:54,410 INFO L87 Difference]: Start difference. First operand 431 states and 462 transitions. Second operand 16 states. [2020-10-27 01:07:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:57,025 INFO L93 Difference]: Finished difference Result 589 states and 634 transitions. [2020-10-27 01:07:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:07:57,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-27 01:07:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:57,029 INFO L225 Difference]: With dead ends: 589 [2020-10-27 01:07:57,029 INFO L226 Difference]: Without dead ends: 585 [2020-10-27 01:07:57,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:07:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-27 01:07:57,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 462. [2020-10-27 01:07:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-27 01:07:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 498 transitions. [2020-10-27 01:07:57,068 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 498 transitions. Word has length 67 [2020-10-27 01:07:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:57,068 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 498 transitions. [2020-10-27 01:07:57,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:07:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 498 transitions. [2020-10-27 01:07:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:57,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:57,070 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1] [2020-10-27 01:07:57,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:07:57,070 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:57,071 INFO L82 PathProgramCache]: Analyzing trace with hash -204978148, now seen corresponding path program 2 times [2020-10-27 01:07:57,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:57,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110263956] [2020-10-27 01:07:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:57,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:59,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:59,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:59,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1918 [2020-10-27 01:07:59,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:07:59,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:59,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:59,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:59,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:59,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:59,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:59,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:59,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110263956] [2020-10-27 01:07:59,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:59,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:07:59,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664419197] [2020-10-27 01:07:59,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:07:59,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:59,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:07:59,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:59,932 INFO L87 Difference]: Start difference. First operand 462 states and 498 transitions. Second operand 16 states. [2020-10-27 01:08:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:02,645 INFO L93 Difference]: Finished difference Result 544 states and 590 transitions. [2020-10-27 01:08:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:08:02,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-27 01:08:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:02,649 INFO L225 Difference]: With dead ends: 544 [2020-10-27 01:08:02,649 INFO L226 Difference]: Without dead ends: 540 [2020-10-27 01:08:02,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:08:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-10-27 01:08:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 515. [2020-10-27 01:08:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-27 01:08:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 554 transitions. [2020-10-27 01:08:02,688 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 554 transitions. Word has length 67 [2020-10-27 01:08:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:02,688 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 554 transitions. [2020-10-27 01:08:02,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 554 transitions. [2020-10-27 01:08:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:08:02,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:02,690 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:02,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:08:02,690 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1945984128, now seen corresponding path program 5 times [2020-10-27 01:08:02,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:02,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678461505] [2020-10-27 01:08:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:02,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:04,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:05,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:06,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:08:06,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:06,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4169 [2020-10-27 01:08:06,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:08:06,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:07,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:07,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:07,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678461505] [2020-10-27 01:08:07,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:07,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:07,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208250220] [2020-10-27 01:08:07,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:07,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:07,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:07,764 INFO L87 Difference]: Start difference. First operand 515 states and 554 transitions. Second operand 16 states. [2020-10-27 01:08:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:10,643 INFO L93 Difference]: Finished difference Result 597 states and 645 transitions. [2020-10-27 01:08:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:10,644 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-27 01:08:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:10,647 INFO L225 Difference]: With dead ends: 597 [2020-10-27 01:08:10,647 INFO L226 Difference]: Without dead ends: 593 [2020-10-27 01:08:10,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:08:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-10-27 01:08:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 424. [2020-10-27 01:08:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-10-27 01:08:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 455 transitions. [2020-10-27 01:08:10,672 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 455 transitions. Word has length 67 [2020-10-27 01:08:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:10,672 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 455 transitions. [2020-10-27 01:08:10,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 455 transitions. [2020-10-27 01:08:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:08:10,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:10,673 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:10,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:08:10,673 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:10,674 INFO L82 PathProgramCache]: Analyzing trace with hash 858831438, now seen corresponding path program 5 times [2020-10-27 01:08:10,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:10,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349732602] [2020-10-27 01:08:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:10,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:11,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:11,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:08:11,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:11,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-10-27 01:08:11,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:11,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:08:11,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:12,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:12,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:12,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:12,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:12,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:12,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:12,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:12,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:12,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:12,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349732602] [2020-10-27 01:08:12,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:12,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:12,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060398118] [2020-10-27 01:08:12,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:12,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:12,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:12,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:12,085 INFO L87 Difference]: Start difference. First operand 424 states and 455 transitions. Second operand 15 states. [2020-10-27 01:08:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:14,236 INFO L93 Difference]: Finished difference Result 439 states and 472 transitions. [2020-10-27 01:08:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:08:14,237 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-27 01:08:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:14,239 INFO L225 Difference]: With dead ends: 439 [2020-10-27 01:08:14,239 INFO L226 Difference]: Without dead ends: 369 [2020-10-27 01:08:14,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-27 01:08:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2020-10-27 01:08:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-27 01:08:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 397 transitions. [2020-10-27 01:08:14,270 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 397 transitions. Word has length 70 [2020-10-27 01:08:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:14,271 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 397 transitions. [2020-10-27 01:08:14,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 397 transitions. [2020-10-27 01:08:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:08:14,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:14,272 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-10-27 01:08:14,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:08:14,272 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:14,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:14,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1631029160, now seen corresponding path program 4 times [2020-10-27 01:08:14,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:14,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940881586] [2020-10-27 01:08:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:14,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:16,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:08:16,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:16,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1836 [2020-10-27 01:08:16,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:16,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:08:16,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:16,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:16,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:16,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:16,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:16,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:16,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:16,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:16,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:16,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940881586] [2020-10-27 01:08:16,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:16,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:16,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651012435] [2020-10-27 01:08:16,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:16,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:16,733 INFO L87 Difference]: Start difference. First operand 369 states and 397 transitions. Second operand 16 states. [2020-10-27 01:08:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:19,292 INFO L93 Difference]: Finished difference Result 449 states and 484 transitions. [2020-10-27 01:08:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:19,293 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-27 01:08:19,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:19,295 INFO L225 Difference]: With dead ends: 449 [2020-10-27 01:08:19,296 INFO L226 Difference]: Without dead ends: 445 [2020-10-27 01:08:19,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:08:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-27 01:08:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 426. [2020-10-27 01:08:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-27 01:08:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 457 transitions. [2020-10-27 01:08:19,322 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 457 transitions. Word has length 70 [2020-10-27 01:08:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:19,322 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 457 transitions. [2020-10-27 01:08:19,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 457 transitions. [2020-10-27 01:08:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:08:19,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:19,323 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:19,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:08:19,323 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash -512975860, now seen corresponding path program 6 times [2020-10-27 01:08:19,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:19,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250699698] [2020-10-27 01:08:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:19,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:20,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:23,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:08:23,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:23,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4304 [2020-10-27 01:08:23,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:23,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:23,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:23,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:08:23,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:24,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:24,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:24,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:24,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:24,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:24,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:24,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:24,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:24,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250699698] [2020-10-27 01:08:24,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:24,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:08:24,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870177205] [2020-10-27 01:08:24,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:08:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:08:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:24,474 INFO L87 Difference]: Start difference. First operand 426 states and 457 transitions. Second operand 16 states. [2020-10-27 01:08:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:27,012 INFO L93 Difference]: Finished difference Result 458 states and 495 transitions. [2020-10-27 01:08:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:08:27,013 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-27 01:08:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:27,015 INFO L225 Difference]: With dead ends: 458 [2020-10-27 01:08:27,016 INFO L226 Difference]: Without dead ends: 445 [2020-10-27 01:08:27,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:08:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-27 01:08:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 429. [2020-10-27 01:08:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 01:08:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 460 transitions. [2020-10-27 01:08:27,044 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 460 transitions. Word has length 70 [2020-10-27 01:08:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:27,044 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 460 transitions. [2020-10-27 01:08:27,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:08:27,044 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 460 transitions. [2020-10-27 01:08:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:08:27,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:27,045 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-10-27 01:08:27,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:08:27,046 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1662206060, now seen corresponding path program 5 times [2020-10-27 01:08:27,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:27,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122642931] [2020-10-27 01:08:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:27,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:27,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:29,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:32,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:32,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:08:32,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:32,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 01:08:32,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:32,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:32,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:32,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:08:32,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:32,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:32,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:32,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:32,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:32,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:32,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:32,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:32,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:32,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:32,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:32,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:32,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122642931] [2020-10-27 01:08:32,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:32,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:32,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101706018] [2020-10-27 01:08:32,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:32,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:32,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:32,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:32,756 INFO L87 Difference]: Start difference. First operand 429 states and 460 transitions. Second operand 15 states. [2020-10-27 01:08:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:34,695 INFO L93 Difference]: Finished difference Result 461 states and 498 transitions. [2020-10-27 01:08:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:08:34,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-27 01:08:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:34,699 INFO L225 Difference]: With dead ends: 461 [2020-10-27 01:08:34,699 INFO L226 Difference]: Without dead ends: 444 [2020-10-27 01:08:34,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:08:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-27 01:08:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 429. [2020-10-27 01:08:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 01:08:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 458 transitions. [2020-10-27 01:08:34,735 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 458 transitions. Word has length 70 [2020-10-27 01:08:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:34,735 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 458 transitions. [2020-10-27 01:08:34,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 458 transitions. [2020-10-27 01:08:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:08:34,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:34,737 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-10-27 01:08:34,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:08:34,737 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash 692698702, now seen corresponding path program 7 times [2020-10-27 01:08:34,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:34,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120990189] [2020-10-27 01:08:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:36,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:36,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:08:36,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:36,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1775 [2020-10-27 01:08:36,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:08:36,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:37,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:37,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:37,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120990189] [2020-10-27 01:08:37,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:37,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:08:37,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30636335] [2020-10-27 01:08:37,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:08:37,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:37,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:08:37,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:37,602 INFO L87 Difference]: Start difference. First operand 429 states and 458 transitions. Second operand 17 states. [2020-10-27 01:08:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:40,756 INFO L93 Difference]: Finished difference Result 646 states and 695 transitions. [2020-10-27 01:08:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:08:40,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-27 01:08:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:40,761 INFO L225 Difference]: With dead ends: 646 [2020-10-27 01:08:40,761 INFO L226 Difference]: Without dead ends: 633 [2020-10-27 01:08:40,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:08:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-10-27 01:08:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 575. [2020-10-27 01:08:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-10-27 01:08:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 614 transitions. [2020-10-27 01:08:40,806 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 614 transitions. Word has length 72 [2020-10-27 01:08:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:40,806 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 614 transitions. [2020-10-27 01:08:40,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:08:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 614 transitions. [2020-10-27 01:08:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:08:40,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:40,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-27 01:08:40,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 01:08:40,808 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:40,808 INFO L82 PathProgramCache]: Analyzing trace with hash 940845196, now seen corresponding path program 6 times [2020-10-27 01:08:40,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:40,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002254115] [2020-10-27 01:08:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:40,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:42,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:42,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:08:42,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:42,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1949 [2020-10-27 01:08:42,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:08:42,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:43,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:43,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:43,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:43,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:43,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:43,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:43,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:43,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:43,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002254115] [2020-10-27 01:08:43,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:43,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:08:43,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183686690] [2020-10-27 01:08:43,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:08:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:08:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:43,604 INFO L87 Difference]: Start difference. First operand 575 states and 614 transitions. Second operand 17 states. [2020-10-27 01:08:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:47,588 INFO L93 Difference]: Finished difference Result 712 states and 769 transitions. [2020-10-27 01:08:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:08:47,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-27 01:08:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:47,592 INFO L225 Difference]: With dead ends: 712 [2020-10-27 01:08:47,592 INFO L226 Difference]: Without dead ends: 708 [2020-10-27 01:08:47,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:08:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2020-10-27 01:08:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 664. [2020-10-27 01:08:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-10-27 01:08:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 708 transitions. [2020-10-27 01:08:47,632 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 708 transitions. Word has length 72 [2020-10-27 01:08:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:47,632 INFO L481 AbstractCegarLoop]: Abstraction has 664 states and 708 transitions. [2020-10-27 01:08:47,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:08:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 708 transitions. [2020-10-27 01:08:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:08:47,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:47,634 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:47,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 01:08:47,634 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1208476937, now seen corresponding path program 11 times [2020-10-27 01:08:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:47,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077993356] [2020-10-27 01:08:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:47,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:48,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:08:48,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-27 01:08:48,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:08:48,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:49,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:49,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:49,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077993356] [2020-10-27 01:08:49,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:49,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:49,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645302138] [2020-10-27 01:08:49,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:49,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:49,388 INFO L87 Difference]: Start difference. First operand 664 states and 708 transitions. Second operand 15 states. [2020-10-27 01:08:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:51,969 INFO L93 Difference]: Finished difference Result 700 states and 750 transitions. [2020-10-27 01:08:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:08:51,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-27 01:08:51,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:51,974 INFO L225 Difference]: With dead ends: 700 [2020-10-27 01:08:51,974 INFO L226 Difference]: Without dead ends: 696 [2020-10-27 01:08:51,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-10-27 01:08:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 652. [2020-10-27 01:08:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2020-10-27 01:08:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 693 transitions. [2020-10-27 01:08:52,010 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 693 transitions. Word has length 73 [2020-10-27 01:08:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:52,010 INFO L481 AbstractCegarLoop]: Abstraction has 652 states and 693 transitions. [2020-10-27 01:08:52,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 693 transitions. [2020-10-27 01:08:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:08:52,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:52,012 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:52,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 01:08:52,013 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash -797853014, now seen corresponding path program 8 times [2020-10-27 01:08:52,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:52,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446779442] [2020-10-27 01:08:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:52,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking...