/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:32:12,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:32:12,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:32:12,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:32:12,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:32:12,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:32:12,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:32:12,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:32:12,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:32:12,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:32:12,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:32:12,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:32:12,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:32:12,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:32:12,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:32:12,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:32:12,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:32:12,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:32:12,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:32:12,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:32:12,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:32:12,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:32:12,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:32:12,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:32:12,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:32:12,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:32:12,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:32:12,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:32:12,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:32:12,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:32:12,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:32:12,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:32:12,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:32:12,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:32:12,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:32:12,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:32:12,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:32:12,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:32:12,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:32:12,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:32:12,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:32:12,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:32:12,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:32:12,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:32:12,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:32:12,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:32:12,333 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:32:12,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:32:12,334 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:32:12,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:32:12,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:32:12,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:32:12,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:32:12,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:32:12,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:32:12,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:32:12,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:32:12,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:32:12,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:32:12,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:32:12,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:32:12,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:32:12,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:32:12,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:32:12,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:32:12,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:32:12,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:32:12,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:32:12,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:32:12,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:32:12,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:32:12,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:32:12,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:32:12,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:32:12,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:32:12,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:32:12,785 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:32:12,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i [2020-10-28 14:32:12,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8b647ed0/c5b8f077fbb74e93bcb0e3175268f9b3/FLAG324b002ce [2020-10-28 14:32:13,655 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:32:13,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i [2020-10-28 14:32:13,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8b647ed0/c5b8f077fbb74e93bcb0e3175268f9b3/FLAG324b002ce [2020-10-28 14:32:13,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8b647ed0/c5b8f077fbb74e93bcb0e3175268f9b3 [2020-10-28 14:32:13,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:32:13,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:32:13,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:32:13,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:32:13,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:32:13,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:32:13" (1/1) ... [2020-10-28 14:32:13,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cfc7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:13, skipping insertion in model container [2020-10-28 14:32:13,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:32:13" (1/1) ... [2020-10-28 14:32:13,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:32:14,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:32:14,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:32:14,434 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:32:14,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:32:14,608 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:32:14,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14 WrapperNode [2020-10-28 14:32:14,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:32:14,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:32:14,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:32:14,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:32:14,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (1/1) ... [2020-10-28 14:32:14,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (1/1) ... [2020-10-28 14:32:14,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (1/1) ... [2020-10-28 14:32:14,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (1/1) ... [2020-10-28 14:32:14,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (1/1) ... [2020-10-28 14:32:14,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (1/1) ... [2020-10-28 14:32:14,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (1/1) ... [2020-10-28 14:32:14,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:32:14,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:32:14,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:32:14,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:32:14,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:32:14,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:32:14,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:32:14,753 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:32:14,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:32:14,753 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:32:14,753 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:32:14,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:32:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:32:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:32:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:32:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:32:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:32:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:32:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:32:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:32:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:32:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:32:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:32:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:32:14,756 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:32:14,756 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:32:14,756 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:32:14,756 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:32:14,756 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:32:14,756 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:32:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:32:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:32:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:32:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:32:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:32:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:32:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:32:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:32:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:32:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:32:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:32:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:32:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:32:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:32:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:32:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:32:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:32:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:32:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:32:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:32:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:32:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:32:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:32:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:32:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:32:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:32:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:32:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:32:14,761 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:32:14,761 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:32:14,761 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:32:14,761 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:32:14,761 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:32:14,761 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:32:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:32:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:32:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:32:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:32:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:32:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:32:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:32:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:32:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:32:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:32:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:32:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:32:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:32:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:32:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:32:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:32:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:32:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:32:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:32:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:32:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:32:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:32:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:32:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:32:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:32:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:32:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:32:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:32:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:32:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:32:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:32:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:32:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:32:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:32:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:32:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:32:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:32:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:32:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:32:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:32:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:32:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:32:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:32:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:32:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:32:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:32:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:32:14,769 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:32:14,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:32:14,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:32:14,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:32:14,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:32:14,769 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:32:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:32:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:32:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:32:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:32:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:32:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:32:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:32:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:32:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:32:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:32:14,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:32:15,431 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:32:15,432 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-28 14:32:15,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:32:15 BoogieIcfgContainer [2020-10-28 14:32:15,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:32:15,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:32:15,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:32:15,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:32:15,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:32:13" (1/3) ... [2020-10-28 14:32:15,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13bb7fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:32:15, skipping insertion in model container [2020-10-28 14:32:15,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:14" (2/3) ... [2020-10-28 14:32:15,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13bb7fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:32:15, skipping insertion in model container [2020-10-28 14:32:15,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:32:15" (3/3) ... [2020-10-28 14:32:15,444 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-1.i [2020-10-28 14:32:15,457 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:32:15,463 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:32:15,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:32:15,508 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:32:15,508 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:32:15,508 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:32:15,508 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:32:15,509 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:32:15,509 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:32:15,509 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:32:15,509 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:32:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-28 14:32:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:32:15,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:15,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:15,538 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash -630579744, now seen corresponding path program 1 times [2020-10-28 14:32:15,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:15,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880541016] [2020-10-28 14:32:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:15,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:15,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:16,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:32:16,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:16,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-28 14:32:16,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:16,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:16,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:16,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:32:16,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:16,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:32:16,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:16,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:16,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:16,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:16,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 14:32:16,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:16,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:16,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880541016] [2020-10-28 14:32:16,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:16,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:32:16,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754056256] [2020-10-28 14:32:16,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:32:16,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:16,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:32:16,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:32:16,254 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-28 14:32:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:16,396 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2020-10-28 14:32:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:32:16,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:32:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:16,432 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:32:16,432 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:32:16,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:32:16,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:32:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 14:32:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:32:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-28 14:32:16,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2020-10-28 14:32:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:16,482 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-28 14:32:16,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:32:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-28 14:32:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:32:16,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:16,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:16,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:32:16,484 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1372892906, now seen corresponding path program 1 times [2020-10-28 14:32:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:16,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372723904] [2020-10-28 14:32:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:16,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:16,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:32:16,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:16,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-28 14:32:16,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:16,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:32:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:32:16,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:16,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:16,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:16,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:16,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:16,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:32:16,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:16,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:16,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:16,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:16,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:16,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:16,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372723904] [2020-10-28 14:32:16,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:16,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:32:16,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404784621] [2020-10-28 14:32:16,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:32:16,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:16,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:32:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:32:16,766 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2020-10-28 14:32:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:16,897 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-28 14:32:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:32:16,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:32:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:16,899 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:32:16,899 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:32:16,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:32:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:32:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-28 14:32:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:32:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-28 14:32:16,908 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 13 [2020-10-28 14:32:16,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:16,908 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-28 14:32:16,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:32:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-28 14:32:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:32:16,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:16,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:16,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:32:16,909 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1882684930, now seen corresponding path program 1 times [2020-10-28 14:32:16,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:16,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605631523] [2020-10-28 14:32:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:16,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:17,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:17,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:32:17,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:17,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-28 14:32:17,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:17,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:32:17,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:32:17,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:17,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:17,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:17,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:17,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:17,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:17,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:32:17,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:17,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:17,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:17,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:17,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605631523] [2020-10-28 14:32:17,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:17,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:32:17,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210174815] [2020-10-28 14:32:17,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:32:17,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:17,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:32:17,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:32:17,130 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-28 14:32:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:17,313 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-28 14:32:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:32:17,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:32:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:17,315 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:32:17,315 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:32:17,316 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 [2020-10-28 14:32:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:32:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-10-28 14:32:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:32:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 14:32:17,326 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2020-10-28 14:32:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:17,327 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 14:32:17,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:32:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 14:32:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:32:17,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:17,328 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:17,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:32:17,329 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:17,329 INFO L82 PathProgramCache]: Analyzing trace with hash -922245935, now seen corresponding path program 1 times [2020-10-28 14:32:17,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:17,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110799707] [2020-10-28 14:32:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:17,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:17,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:17,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:32:17,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:17,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-28 14:32:17,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:17,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:32:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:17,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:32:17,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:18,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:18,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:18,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:18,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:18,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:32:18,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:18,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:18,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110799707] [2020-10-28 14:32:18,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:18,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:32:18,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789010560] [2020-10-28 14:32:18,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:32:18,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:18,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:32:18,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:18,054 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 8 states. [2020-10-28 14:32:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:18,491 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-28 14:32:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:32:18,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 14:32:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:18,493 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:32:18,493 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:32:18,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:32:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2020-10-28 14:32:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:32:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-28 14:32:18,503 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 19 [2020-10-28 14:32:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:18,504 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-28 14:32:18,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:32:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-28 14:32:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:32:18,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:18,505 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:18,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:32:18,505 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:18,506 INFO L82 PathProgramCache]: Analyzing trace with hash -221181357, now seen corresponding path program 1 times [2020-10-28 14:32:18,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:18,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359125255] [2020-10-28 14:32:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:18,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:18,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:18,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:32:18,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:18,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-28 14:32:18,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:18,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:32:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:32:18,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:19,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:19,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:19,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:19,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:19,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:32:19,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:19,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:19,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:19,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:19,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:19,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359125255] [2020-10-28 14:32:19,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:19,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:32:19,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499209167] [2020-10-28 14:32:19,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:32:19,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:19,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:32:19,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:19,122 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 8 states. [2020-10-28 14:32:19,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:19,436 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-28 14:32:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:32:19,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 14:32:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:19,438 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:32:19,438 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:32:19,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:32:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2020-10-28 14:32:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:32:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 14:32:19,453 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-28 14:32:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:19,453 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 14:32:19,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:32:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 14:32:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:32:19,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:19,457 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] [2020-10-28 14:32:19,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:32:19,458 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1654214030, now seen corresponding path program 1 times [2020-10-28 14:32:19,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:19,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120739496] [2020-10-28 14:32:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:19,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:19,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:19,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:19,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:32:19,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:19,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-28 14:32:19,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:19,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:32:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:19,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:32:19,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:19,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:19,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:19,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:19,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:19,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:19,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:19,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:19,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:19,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:19,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:19,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:19,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:19,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120739496] [2020-10-28 14:32:19,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:19,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:32:19,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326877201] [2020-10-28 14:32:19,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:32:19,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:19,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:32:19,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:32:19,958 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-28 14:32:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:20,144 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-28 14:32:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:32:20,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 14:32:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:20,146 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:32:20,146 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:32:20,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:32:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-28 14:32:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:32:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 14:32:20,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 20 [2020-10-28 14:32:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:20,155 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 14:32:20,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:32:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 14:32:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:32:20,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:20,157 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] [2020-10-28 14:32:20,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:32:20,157 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:20,158 INFO L82 PathProgramCache]: Analyzing trace with hash 128959175, now seen corresponding path program 1 times [2020-10-28 14:32:20,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:20,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983979107] [2020-10-28 14:32:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:20,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:20,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:20,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:20,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:32:20,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:20,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-28 14:32:20,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:20,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:32:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:20,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:32:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:20,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:20,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:20,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:20,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:20,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:20,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:20,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:20,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:20,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:20,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:20,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:20,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:20,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983979107] [2020-10-28 14:32:20,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:20,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:32:20,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142955333] [2020-10-28 14:32:20,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:32:20,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:32:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:32:20,497 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 7 states. [2020-10-28 14:32:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:20,743 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-10-28 14:32:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:32:20,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-28 14:32:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:20,745 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:32:20,745 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:32:20,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:32:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-28 14:32:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:32:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-28 14:32:20,764 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 23 [2020-10-28 14:32:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:20,764 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-28 14:32:20,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:32:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-28 14:32:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:32:20,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:20,769 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] [2020-10-28 14:32:20,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:32:20,769 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1442690721, now seen corresponding path program 1 times [2020-10-28 14:32:20,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:20,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961253826] [2020-10-28 14:32:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:20,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:20,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:21,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:21,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:32:21,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:21,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-28 14:32:21,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:21,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:32:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:21,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:32:21,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:21,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:21,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:21,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:21,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:21,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:21,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:21,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:21,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:21,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:21,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:21,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961253826] [2020-10-28 14:32:21,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:21,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:32:21,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475682038] [2020-10-28 14:32:21,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:32:21,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:21,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:32:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:21,595 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 8 states. [2020-10-28 14:32:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:21,886 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-28 14:32:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:32:21,887 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 14:32:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:21,888 INFO L225 Difference]: With dead ends: 79 [2020-10-28 14:32:21,888 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 14:32:21,889 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 [2020-10-28 14:32:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 14:32:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 53. [2020-10-28 14:32:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:32:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-28 14:32:21,898 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 23 [2020-10-28 14:32:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:21,899 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-28 14:32:21,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:32:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-28 14:32:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:32:21,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:21,900 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:21,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:32:21,900 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2015565550, now seen corresponding path program 2 times [2020-10-28 14:32:21,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:21,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285922539] [2020-10-28 14:32:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:21,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:22,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:22,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:32:22,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:22,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-28 14:32:22,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:22,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:22,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:32:22,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:22,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:32:22,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:22,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:22,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:22,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:22,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:22,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:22,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:32:22,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:22,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:22,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:22,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:22,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:22,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:32:22,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285922539] [2020-10-28 14:32:22,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:22,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:32:22,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270245762] [2020-10-28 14:32:22,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:32:22,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:22,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:32:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:32:22,110 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 6 states. [2020-10-28 14:32:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:22,255 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-10-28 14:32:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:32:22,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-28 14:32:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:22,257 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:32:22,257 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:32:22,258 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 [2020-10-28 14:32:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:32:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 14:32:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:32:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-28 14:32:22,277 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 26 [2020-10-28 14:32:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:22,277 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-28 14:32:22,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:32:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-28 14:32:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:32:22,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:22,278 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] [2020-10-28 14:32:22,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:32:22,278 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:22,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1868815080, now seen corresponding path program 1 times [2020-10-28 14:32:22,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:22,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309381839] [2020-10-28 14:32:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:22,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:22,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:22,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:32:22,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:22,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 14:32:22,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:22,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:22,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:32:22,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:22,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:32:22,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:22,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:22,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:22,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:22,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:22,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:22,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:22,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:22,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:22,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:22,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:22,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:22,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:22,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309381839] [2020-10-28 14:32:22,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:22,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:32:22,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242584096] [2020-10-28 14:32:22,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:32:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:32:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:32:22,668 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-10-28 14:32:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:23,013 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-28 14:32:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:32:23,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 14:32:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:23,015 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:32:23,015 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:32:23,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:32:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-28 14:32:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:32:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-28 14:32:23,032 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 26 [2020-10-28 14:32:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:23,032 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-28 14:32:23,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:32:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-28 14:32:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:32:23,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:23,039 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] [2020-10-28 14:32:23,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:32:23,039 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:23,040 INFO L82 PathProgramCache]: Analyzing trace with hash 432007510, now seen corresponding path program 1 times [2020-10-28 14:32:23,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:23,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561746255] [2020-10-28 14:32:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:23,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:23,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:23,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:32:23,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:23,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-28 14:32:23,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:23,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:23,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:32:23,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:23,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:32:23,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:23,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:23,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:23,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:23,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:23,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:23,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:23,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:23,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:23,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:23,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561746255] [2020-10-28 14:32:23,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:23,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:32:23,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349639468] [2020-10-28 14:32:23,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:32:23,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:23,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:32:23,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:32:23,543 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 9 states. [2020-10-28 14:32:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:24,200 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-10-28 14:32:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:32:24,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 14:32:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:24,203 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:32:24,204 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:32:24,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:32:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2020-10-28 14:32:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:32:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-28 14:32:24,227 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 26 [2020-10-28 14:32:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:24,230 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-28 14:32:24,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:32:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-28 14:32:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:32:24,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:24,234 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:24,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:32:24,235 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:24,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1718954766, now seen corresponding path program 1 times [2020-10-28 14:32:24,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:24,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487533422] [2020-10-28 14:32:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:24,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:24,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:24,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:32:24,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:24,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-10-28 14:32:24,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:24,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:24,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:32:24,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:24,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:32:24,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:32:24,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:24,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:24,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:24,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:24,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:24,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:32:24,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:24,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:24,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:24,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:24,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:24,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487533422] [2020-10-28 14:32:24,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:24,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:32:24,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887544423] [2020-10-28 14:32:24,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:32:24,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:24,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:32:24,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:24,995 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 8 states. [2020-10-28 14:32:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:25,269 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-28 14:32:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:32:25,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-28 14:32:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:25,270 INFO L225 Difference]: With dead ends: 78 [2020-10-28 14:32:25,270 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 14:32:25,271 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 [2020-10-28 14:32:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 14:32:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-28 14:32:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:32:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-28 14:32:25,280 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 26 [2020-10-28 14:32:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:25,280 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-28 14:32:25,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:32:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-28 14:32:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:25,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:25,281 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] [2020-10-28 14:32:25,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:32:25,282 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1684555517, now seen corresponding path program 2 times [2020-10-28 14:32:25,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:25,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697521038] [2020-10-28 14:32:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:25,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:25,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:25,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:25,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:25,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:25,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-28 14:32:25,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:25,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:25,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:32:25,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:25,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:32:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:25,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:25,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:25,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:25,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:25,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:25,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:25,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:25,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:25,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:25,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:25,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:25,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697521038] [2020-10-28 14:32:25,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:25,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:25,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702322491] [2020-10-28 14:32:25,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:25,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:25,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:25,821 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 10 states. [2020-10-28 14:32:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:26,383 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2020-10-28 14:32:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:32:26,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:26,385 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:32:26,386 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:32:26,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:32:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-10-28 14:32:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:32:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-28 14:32:26,410 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 29 [2020-10-28 14:32:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:26,410 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-28 14:32:26,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-28 14:32:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:26,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:26,413 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] [2020-10-28 14:32:26,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:32:26,417 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:26,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2095142183, now seen corresponding path program 3 times [2020-10-28 14:32:26,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:26,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380121741] [2020-10-28 14:32:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:26,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:27,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:27,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:27,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:27,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-28 14:32:27,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:27,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:32:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:32:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:27,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:27,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:27,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:27,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:27,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:27,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:27,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:27,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:27,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:27,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:27,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:27,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:27,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380121741] [2020-10-28 14:32:27,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:27,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:27,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685946104] [2020-10-28 14:32:27,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:27,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:27,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:27,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:27,288 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 10 states. [2020-10-28 14:32:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:27,825 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-10-28 14:32:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:32:27,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:27,826 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:32:27,826 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:32:27,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:32:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2020-10-28 14:32:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:32:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-28 14:32:27,836 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 29 [2020-10-28 14:32:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:27,836 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-28 14:32:27,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-28 14:32:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:27,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:27,837 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:27,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:32:27,837 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash 100997477, now seen corresponding path program 1 times [2020-10-28 14:32:27,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:27,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077966898] [2020-10-28 14:32:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:27,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:28,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:28,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:28,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:28,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-28 14:32:28,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:28,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:32:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:28,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:32:28,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:28,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:28,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:28,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:28,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:28,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:28,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:28,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:28,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:28,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:28,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:28,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077966898] [2020-10-28 14:32:28,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:28,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:28,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630397524] [2020-10-28 14:32:28,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:28,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:28,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:28,885 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 10 states. [2020-10-28 14:32:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:29,387 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2020-10-28 14:32:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:32:29,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:29,388 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:32:29,389 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:32:29,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:32:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2020-10-28 14:32:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:32:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-28 14:32:29,406 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 29 [2020-10-28 14:32:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:29,406 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-28 14:32:29,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-28 14:32:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:29,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:29,407 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] [2020-10-28 14:32:29,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:32:29,407 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2107257343, now seen corresponding path program 2 times [2020-10-28 14:32:29,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:29,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313053330] [2020-10-28 14:32:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:29,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:29,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:30,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:30,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:30,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-28 14:32:30,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:30,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:30,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:32:30,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:30,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:32:30,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:30,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:30,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:30,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:30,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:30,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:30,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:30,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:30,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:30,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:30,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:30,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:30,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:30,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313053330] [2020-10-28 14:32:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:30,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245037422] [2020-10-28 14:32:30,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:30,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:30,310 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 10 states. [2020-10-28 14:32:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:30,827 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-28 14:32:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:32:30,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:30,828 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:32:30,829 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:32:30,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:32:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:32:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 73. [2020-10-28 14:32:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:32:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-28 14:32:30,839 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 29 [2020-10-28 14:32:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:30,839 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-28 14:32:30,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-28 14:32:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:30,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:30,840 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] [2020-10-28 14:32:30,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:32:30,841 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:30,841 INFO L82 PathProgramCache]: Analyzing trace with hash -43704933, now seen corresponding path program 1 times [2020-10-28 14:32:30,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:30,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763030544] [2020-10-28 14:32:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:31,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:31,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:31,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:31,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-28 14:32:31,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:31,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:32:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:32:31,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:31,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:31,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:31,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:31,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:31,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:31,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:31,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:31,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:31,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:31,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763030544] [2020-10-28 14:32:31,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:31,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:31,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8826211] [2020-10-28 14:32:31,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:31,299 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 10 states. [2020-10-28 14:32:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:31,802 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-28 14:32:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:32:31,804 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:31,805 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:32:31,805 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 14:32:31,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 14:32:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2020-10-28 14:32:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 14:32:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-28 14:32:31,815 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 29 [2020-10-28 14:32:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:31,816 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-28 14:32:31,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-28 14:32:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:31,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:31,817 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:31,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:32:31,817 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:31,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1777123287, now seen corresponding path program 2 times [2020-10-28 14:32:31,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:31,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821142864] [2020-10-28 14:32:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:32,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:32,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:32,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:32,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-28 14:32:32,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:32,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:32:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:32:32,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:32,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:32,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:32,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:32,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:32,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:32,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:32:32,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:32,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:32,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:32,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:32,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821142864] [2020-10-28 14:32:32,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:32,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:32:32,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674424187] [2020-10-28 14:32:32,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:32:32,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:32:32,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:32:32,412 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 11 states. [2020-10-28 14:32:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:32,977 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-10-28 14:32:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:32:32,978 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-28 14:32:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:32,979 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:32:32,979 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:32:32,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:32:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:32:32,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2020-10-28 14:32:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:32:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-28 14:32:32,992 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 29 [2020-10-28 14:32:32,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:32,992 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-28 14:32:32,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:32:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-28 14:32:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:32,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:32,994 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] [2020-10-28 14:32:32,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:32:32,994 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2089066232, now seen corresponding path program 4 times [2020-10-28 14:32:32,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:32,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962551083] [2020-10-28 14:32:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:33,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:33,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:33,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:33,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-28 14:32:33,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:33,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:32:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:32:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:33,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:33,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:33,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:33,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:33,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:33,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:33,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:32:33,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962551083] [2020-10-28 14:32:33,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:33,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:32:33,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586247968] [2020-10-28 14:32:33,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:32:33,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:33,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:32:33,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:32:33,316 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 9 states. [2020-10-28 14:32:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:33,572 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-28 14:32:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:32:33,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-28 14:32:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:33,573 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:32:33,573 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:32:33,574 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 [2020-10-28 14:32:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:32:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 14:32:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:32:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-28 14:32:33,582 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 32 [2020-10-28 14:32:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:33,583 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-28 14:32:33,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:32:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-28 14:32:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:33,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:33,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:33,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:32:33,584 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1809574030, now seen corresponding path program 5 times [2020-10-28 14:32:33,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:33,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761417334] [2020-10-28 14:32:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:33,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:33,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:33,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:33,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:33,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-28 14:32:33,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:33,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:33,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:33,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:32:33,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:34,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:34,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:34,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:34,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:34,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:34,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:34,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:34,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:34,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761417334] [2020-10-28 14:32:34,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:34,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:32:34,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825869194] [2020-10-28 14:32:34,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:32:34,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:34,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:32:34,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:32:34,199 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 11 states. [2020-10-28 14:32:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:34,749 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-10-28 14:32:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:32:34,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:32:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:34,751 INFO L225 Difference]: With dead ends: 106 [2020-10-28 14:32:34,751 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 14:32:34,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:32:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 14:32:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-28 14:32:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:32:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-28 14:32:34,764 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 32 [2020-10-28 14:32:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:34,764 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-28 14:32:34,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:32:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-28 14:32:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:34,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:34,765 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:34,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:32:34,765 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash -341388246, now seen corresponding path program 1 times [2020-10-28 14:32:34,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:34,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344856576] [2020-10-28 14:32:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:34,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:35,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:35,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-28 14:32:35,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:32:35,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:35,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:35,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:35,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:35,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:35,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:35,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:35,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344856576] [2020-10-28 14:32:35,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:35,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:32:35,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63443608] [2020-10-28 14:32:35,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:32:35,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:35,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:32:35,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:32:35,569 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 11 states. [2020-10-28 14:32:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:36,126 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-10-28 14:32:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:32:36,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:32:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:36,127 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:32:36,127 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:32:36,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:32:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:32:36,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2020-10-28 14:32:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:32:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-28 14:32:36,137 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 32 [2020-10-28 14:32:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:36,137 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-28 14:32:36,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:32:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-28 14:32:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:36,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:36,138 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:36,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:32:36,138 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:36,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2062691440, now seen corresponding path program 3 times [2020-10-28 14:32:36,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:36,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107454315] [2020-10-28 14:32:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:36,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:36,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:36,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-28 14:32:36,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:36,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:32:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:36,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:36,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:36,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:36,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:36,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:36,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:36,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:36,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:36,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:36,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:36,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107454315] [2020-10-28 14:32:36,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:36,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:32:36,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399208098] [2020-10-28 14:32:36,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:32:36,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:36,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:32:36,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:32:36,841 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 11 states. [2020-10-28 14:32:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:37,635 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2020-10-28 14:32:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:32:37,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:32:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:37,639 INFO L225 Difference]: With dead ends: 112 [2020-10-28 14:32:37,639 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 14:32:37,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:32:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 14:32:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2020-10-28 14:32:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:32:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-28 14:32:37,649 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 32 [2020-10-28 14:32:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:37,650 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-28 14:32:37,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:32:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-28 14:32:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:37,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:37,650 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:37,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:32:37,651 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:37,651 INFO L82 PathProgramCache]: Analyzing trace with hash 81313580, now seen corresponding path program 1 times [2020-10-28 14:32:37,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:37,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467505370] [2020-10-28 14:32:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:38,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:38,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-28 14:32:38,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:32:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:38,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:32:38,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:38,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:38,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:38,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:38,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:38,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:38,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467505370] [2020-10-28 14:32:38,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:38,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:32:38,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150852013] [2020-10-28 14:32:38,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:32:38,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:38,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:32:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:32:38,333 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 11 states. [2020-10-28 14:32:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:38,893 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2020-10-28 14:32:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:32:38,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:32:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:38,895 INFO L225 Difference]: With dead ends: 122 [2020-10-28 14:32:38,895 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:32:38,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:32:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2020-10-28 14:32:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 14:32:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-10-28 14:32:38,905 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 32 [2020-10-28 14:32:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:38,906 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-10-28 14:32:38,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:32:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-10-28 14:32:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:38,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:38,907 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] [2020-10-28 14:32:38,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:32:38,907 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:38,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1955052726, now seen corresponding path program 3 times [2020-10-28 14:32:38,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:38,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730706455] [2020-10-28 14:32:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:38,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:40,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:40,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:40,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:40,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-28 14:32:40,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:40,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:40,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:32:40,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:40,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:32:40,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:40,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:40,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:40,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:40,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:40,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:40,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:40,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:40,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:40,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:40,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:40,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:40,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:40,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730706455] [2020-10-28 14:32:40,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:40,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:32:40,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813752881] [2020-10-28 14:32:40,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:32:40,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:32:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:32:40,324 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 11 states. [2020-10-28 14:32:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:41,105 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2020-10-28 14:32:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:32:41,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-28 14:32:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:41,106 INFO L225 Difference]: With dead ends: 115 [2020-10-28 14:32:41,106 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 14:32:41,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:41,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 14:32:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-10-28 14:32:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 14:32:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-28 14:32:41,116 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 32 [2020-10-28 14:32:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:41,116 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-28 14:32:41,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:32:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-28 14:32:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:41,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:41,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:41,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:32:41,117 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:41,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:41,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1675560524, now seen corresponding path program 4 times [2020-10-28 14:32:41,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:41,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605586392] [2020-10-28 14:32:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:41,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:42,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:42,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:42,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:42,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-10-28 14:32:42,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:42,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:32:42,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:42,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:42,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:42,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:42,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:42,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:42,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:42,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:42,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:42,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:42,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:42,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:42,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:42,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605586392] [2020-10-28 14:32:42,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:42,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:42,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823151885] [2020-10-28 14:32:42,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:42,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:42,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:42,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:42,695 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 12 states. [2020-10-28 14:32:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:43,486 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2020-10-28 14:32:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:32:43,486 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:32:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:43,488 INFO L225 Difference]: With dead ends: 143 [2020-10-28 14:32:43,488 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 14:32:43,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 14:32:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-28 14:32:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 14:32:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-10-28 14:32:43,501 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 32 [2020-10-28 14:32:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:43,502 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-10-28 14:32:43,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-10-28 14:32:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:43,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:43,503 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:43,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:32:43,503 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash -475401752, now seen corresponding path program 2 times [2020-10-28 14:32:43,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:43,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169821884] [2020-10-28 14:32:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:43,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:43,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:43,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:43,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:43,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-28 14:32:43,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:43,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:43,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:43,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:43,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:32:43,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:44,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:44,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:44,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:44,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:44,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:44,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:44,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:44,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169821884] [2020-10-28 14:32:44,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:44,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:44,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500786241] [2020-10-28 14:32:44,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:44,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:44,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:44,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:44,174 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 12 states. [2020-10-28 14:32:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:44,877 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2020-10-28 14:32:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:32:44,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:32:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:44,879 INFO L225 Difference]: With dead ends: 146 [2020-10-28 14:32:44,879 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 14:32:44,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:32:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 14:32:44,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2020-10-28 14:32:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:32:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-10-28 14:32:44,894 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 32 [2020-10-28 14:32:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:44,895 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-10-28 14:32:44,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-10-28 14:32:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:44,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:44,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:44,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:32:44,896 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2098262350, now seen corresponding path program 4 times [2020-10-28 14:32:44,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:44,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550538044] [2020-10-28 14:32:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:44,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:45,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:46,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1496 [2020-10-28 14:32:46,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:32:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:46,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:46,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:46,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:46,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:46,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:46,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550538044] [2020-10-28 14:32:46,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:46,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:46,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872205771] [2020-10-28 14:32:46,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:46,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:46,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:46,695 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 12 states. [2020-10-28 14:32:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:47,501 INFO L93 Difference]: Finished difference Result 175 states and 203 transitions. [2020-10-28 14:32:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:32:47,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:32:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:47,502 INFO L225 Difference]: With dead ends: 175 [2020-10-28 14:32:47,503 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 14:32:47,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 14:32:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 117. [2020-10-28 14:32:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:32:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-10-28 14:32:47,518 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 32 [2020-10-28 14:32:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:47,518 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-10-28 14:32:47,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-10-28 14:32:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:32:47,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:47,519 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:47,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:32:47,521 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash -52699926, now seen corresponding path program 2 times [2020-10-28 14:32:47,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:47,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047977916] [2020-10-28 14:32:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:48,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:48,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:32:48,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:48,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-28 14:32:48,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:48,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:32:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:48,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:32:48,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:48,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:48,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:48,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:48,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:48,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:48,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:48,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:48,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:48,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:48,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047977916] [2020-10-28 14:32:48,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:48,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:48,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586733093] [2020-10-28 14:32:48,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:48,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:48,247 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 12 states. [2020-10-28 14:32:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:48,948 INFO L93 Difference]: Finished difference Result 161 states and 186 transitions. [2020-10-28 14:32:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:48,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:32:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:48,950 INFO L225 Difference]: With dead ends: 161 [2020-10-28 14:32:48,950 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 14:32:48,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 14:32:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 117. [2020-10-28 14:32:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 14:32:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-10-28 14:32:48,964 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 32 [2020-10-28 14:32:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:48,965 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-10-28 14:32:48,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-10-28 14:32:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:48,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:48,965 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:48,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:32:48,966 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1516025913, now seen corresponding path program 6 times [2020-10-28 14:32:48,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:48,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739721635] [2020-10-28 14:32:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:48,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:49,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:49,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:49,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:49,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:49,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-28 14:32:49,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:49,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:49,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:32:49,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:49,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:32:49,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:49,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:49,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:49,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:49,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:49,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:49,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:49,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:49,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:49,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:49,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739721635] [2020-10-28 14:32:49,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:49,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:49,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893882553] [2020-10-28 14:32:49,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:49,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:49,864 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 12 states. [2020-10-28 14:32:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:50,598 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2020-10-28 14:32:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:32:50,599 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:32:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:50,600 INFO L225 Difference]: With dead ends: 151 [2020-10-28 14:32:50,600 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 14:32:50,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:32:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 14:32:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-10-28 14:32:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 14:32:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2020-10-28 14:32:50,618 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 35 [2020-10-28 14:32:50,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:50,618 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2020-10-28 14:32:50,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2020-10-28 14:32:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:50,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:50,619 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] [2020-10-28 14:32:50,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:32:50,619 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:50,620 INFO L82 PathProgramCache]: Analyzing trace with hash 348486905, now seen corresponding path program 2 times [2020-10-28 14:32:50,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:50,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471070075] [2020-10-28 14:32:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:50,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:50,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:51,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:51,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:51,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:51,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-28 14:32:51,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:51,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:51,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:32:51,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:51,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:32:51,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:51,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:51,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:51,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:51,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:51,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:51,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:51,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:51,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:51,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:51,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:51,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:51,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:51,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471070075] [2020-10-28 14:32:51,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:51,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:51,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451298222] [2020-10-28 14:32:51,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:51,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:51,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:52,000 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 13 states. [2020-10-28 14:32:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:52,729 INFO L93 Difference]: Finished difference Result 177 states and 204 transitions. [2020-10-28 14:32:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:52,730 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:32:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:52,732 INFO L225 Difference]: With dead ends: 177 [2020-10-28 14:32:52,732 INFO L226 Difference]: Without dead ends: 173 [2020-10-28 14:32:52,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:32:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-28 14:32:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 112. [2020-10-28 14:32:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 14:32:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2020-10-28 14:32:52,750 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 35 [2020-10-28 14:32:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:52,751 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2020-10-28 14:32:52,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2020-10-28 14:32:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:52,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:52,752 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:52,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:32:52,752 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash 771188731, now seen corresponding path program 3 times [2020-10-28 14:32:52,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:52,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306801020] [2020-10-28 14:32:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:52,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:53,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:53,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:53,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:53,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:53,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1093 [2020-10-28 14:32:53,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:53,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:32:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:53,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:32:53,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:54,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:54,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:54,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:54,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:54,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:54,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:54,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:54,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:54,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:54,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:54,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:54,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306801020] [2020-10-28 14:32:54,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:54,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:54,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140769333] [2020-10-28 14:32:54,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:54,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:54,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:54,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:54,227 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 13 states. [2020-10-28 14:32:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:54,925 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2020-10-28 14:32:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:32:54,926 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:32:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:54,928 INFO L225 Difference]: With dead ends: 151 [2020-10-28 14:32:54,928 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 14:32:54,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:32:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 14:32:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 98. [2020-10-28 14:32:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 14:32:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-10-28 14:32:54,942 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 35 [2020-10-28 14:32:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:54,942 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-10-28 14:32:54,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:32:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-10-28 14:32:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:54,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:54,943 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:54,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:32:54,943 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1650039419, now seen corresponding path program 5 times [2020-10-28 14:32:54,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:54,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388113786] [2020-10-28 14:32:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:54,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:55,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:56,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:56,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:56,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:56,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1114 [2020-10-28 14:32:56,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:56,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:32:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:32:56,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:56,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:56,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:56,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:56,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:56,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:56,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:56,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:56,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388113786] [2020-10-28 14:32:56,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:56,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:56,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622953697] [2020-10-28 14:32:56,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:56,390 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 12 states. [2020-10-28 14:32:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:57,202 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2020-10-28 14:32:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:57,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:32:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:57,204 INFO L225 Difference]: With dead ends: 149 [2020-10-28 14:32:57,204 INFO L226 Difference]: Without dead ends: 136 [2020-10-28 14:32:57,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-28 14:32:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2020-10-28 14:32:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:32:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2020-10-28 14:32:57,217 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 35 [2020-10-28 14:32:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:57,218 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2020-10-28 14:32:57,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2020-10-28 14:32:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:57,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:57,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:57,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:32:57,219 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash 493965601, now seen corresponding path program 4 times [2020-10-28 14:32:57,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:57,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71222778] [2020-10-28 14:32:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:57,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:57,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:57,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:57,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:57,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 14:32:57,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:57,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:32:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:57,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:32:57,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:57,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:57,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:57,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:57,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:57,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:57,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:57,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:57,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:57,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71222778] [2020-10-28 14:32:57,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:57,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:32:57,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361355080] [2020-10-28 14:32:57,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:32:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:32:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:57,943 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 12 states. [2020-10-28 14:32:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:58,756 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2020-10-28 14:32:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:32:58,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:32:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:58,758 INFO L225 Difference]: With dead ends: 139 [2020-10-28 14:32:58,758 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 14:32:58,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:32:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 14:32:58,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2020-10-28 14:32:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 14:32:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2020-10-28 14:32:58,775 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 35 [2020-10-28 14:32:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:58,775 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2020-10-28 14:32:58,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:32:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2020-10-28 14:32:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:32:58,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:58,776 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:58,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:32:58,776 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1929531621, now seen corresponding path program 6 times [2020-10-28 14:32:58,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:58,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711758541] [2020-10-28 14:32:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:58,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:59,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:59,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:32:59,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:59,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-28 14:32:59,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:59,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:32:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:32:59,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:59,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:59,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:59,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:59,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:59,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:59,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:32:59,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:59,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:59,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:59,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:59,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:59,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:59,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711758541] [2020-10-28 14:32:59,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:59,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:32:59,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836185470] [2020-10-28 14:32:59,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:32:59,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:32:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:59,545 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 13 states. [2020-10-28 14:33:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:00,468 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2020-10-28 14:33:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:33:00,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:33:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:00,472 INFO L225 Difference]: With dead ends: 170 [2020-10-28 14:33:00,473 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 14:33:00,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 14:33:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2020-10-28 14:33:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 14:33:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2020-10-28 14:33:00,485 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 35 [2020-10-28 14:33:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:00,486 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2020-10-28 14:33:00,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2020-10-28 14:33:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:00,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:00,486 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:00,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:33:00,487 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:00,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:00,487 INFO L82 PathProgramCache]: Analyzing trace with hash 214473399, now seen corresponding path program 5 times [2020-10-28 14:33:00,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:00,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681322259] [2020-10-28 14:33:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:00,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:00,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:00,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:00,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:00,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-28 14:33:00,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:00,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:00,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:33:00,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:00,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:33:00,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:01,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:01,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:01,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:01,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:01,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:01,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:01,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:01,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:01,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:01,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:01,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:01,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:33:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:01,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681322259] [2020-10-28 14:33:01,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:01,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:01,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167676420] [2020-10-28 14:33:01,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:01,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:01,422 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 13 states. [2020-10-28 14:33:02,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:02,403 INFO L93 Difference]: Finished difference Result 214 states and 250 transitions. [2020-10-28 14:33:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:33:02,403 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:33:02,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:02,405 INFO L225 Difference]: With dead ends: 214 [2020-10-28 14:33:02,405 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 14:33:02,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 14:33:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 148. [2020-10-28 14:33:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 14:33:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 173 transitions. [2020-10-28 14:33:02,425 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 173 transitions. Word has length 35 [2020-10-28 14:33:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:02,426 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 173 transitions. [2020-10-28 14:33:02,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 173 transitions. [2020-10-28 14:33:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:02,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:02,426 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:02,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:33:02,427 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:02,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1506829795, now seen corresponding path program 7 times [2020-10-28 14:33:02,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:02,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614231568] [2020-10-28 14:33:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:02,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:02,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:02,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:02,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:02,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-28 14:33:02,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:02,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:02,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:33:02,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:03,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:03,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:03,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:03,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:03,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:03,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:03,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:03,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:03,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:03,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:03,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614231568] [2020-10-28 14:33:03,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:03,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:03,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222331210] [2020-10-28 14:33:03,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:03,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:03,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:03,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:03,266 INFO L87 Difference]: Start difference. First operand 148 states and 173 transitions. Second operand 13 states. [2020-10-28 14:33:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:04,235 INFO L93 Difference]: Finished difference Result 204 states and 238 transitions. [2020-10-28 14:33:04,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:33:04,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:33:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:04,238 INFO L225 Difference]: With dead ends: 204 [2020-10-28 14:33:04,238 INFO L226 Difference]: Without dead ends: 200 [2020-10-28 14:33:04,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-28 14:33:04,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 123. [2020-10-28 14:33:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 14:33:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2020-10-28 14:33:04,255 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 35 [2020-10-28 14:33:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:04,255 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2020-10-28 14:33:04,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2020-10-28 14:33:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:04,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:04,256 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:04,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:33:04,256 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1182195041, now seen corresponding path program 5 times [2020-10-28 14:33:04,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:04,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086411148] [2020-10-28 14:33:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:04,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:04,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:04,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:04,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:04,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 14:33:04,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:04,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:04,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:33:04,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:04,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:33:04,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:04,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:04,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:04,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:04,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:04,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:04,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:04,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:04,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:04,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:33:04,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086411148] [2020-10-28 14:33:04,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:04,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:33:04,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856641974] [2020-10-28 14:33:04,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:33:04,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:04,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:33:04,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:33:04,773 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand 10 states. [2020-10-28 14:33:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:05,196 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2020-10-28 14:33:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:33:05,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-28 14:33:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:05,200 INFO L225 Difference]: With dead ends: 143 [2020-10-28 14:33:05,200 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 14:33:05,200 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 [2020-10-28 14:33:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 14:33:05,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-28 14:33:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 14:33:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2020-10-28 14:33:05,217 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 35 [2020-10-28 14:33:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:05,217 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2020-10-28 14:33:05,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:33:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2020-10-28 14:33:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:05,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:05,218 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:05,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:33:05,219 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash 407202121, now seen corresponding path program 8 times [2020-10-28 14:33:05,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:05,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255347612] [2020-10-28 14:33:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:05,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:06,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:06,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:06,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:06,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-28 14:33:06,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:06,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:33:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:33:06,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:06,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:06,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:06,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:06,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:06,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:06,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:06,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:06,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:06,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:06,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:06,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255347612] [2020-10-28 14:33:06,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:06,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:06,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710835276] [2020-10-28 14:33:06,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:06,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:06,425 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand 13 states. [2020-10-28 14:33:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:07,350 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2020-10-28 14:33:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:33:07,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:33:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:07,352 INFO L225 Difference]: With dead ends: 185 [2020-10-28 14:33:07,352 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 14:33:07,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:33:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 14:33:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-28 14:33:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:33:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2020-10-28 14:33:07,373 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 35 [2020-10-28 14:33:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:07,373 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2020-10-28 14:33:07,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2020-10-28 14:33:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:07,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:07,380 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:07,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:33:07,380 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:07,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1743760155, now seen corresponding path program 6 times [2020-10-28 14:33:07,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:07,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545867839] [2020-10-28 14:33:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:07,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:07,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:07,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:08,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:08,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:08,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:08,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1572 [2020-10-28 14:33:08,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:08,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:33:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:33:08,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:09,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:09,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:09,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:09,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:09,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:09,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:09,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:09,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:09,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:09,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545867839] [2020-10-28 14:33:09,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:09,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:09,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809826764] [2020-10-28 14:33:09,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:09,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:09,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:09,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:09,226 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand 13 states. [2020-10-28 14:33:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:10,135 INFO L93 Difference]: Finished difference Result 172 states and 196 transitions. [2020-10-28 14:33:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:10,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:33:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:10,139 INFO L225 Difference]: With dead ends: 172 [2020-10-28 14:33:10,139 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 14:33:10,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:10,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 14:33:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2020-10-28 14:33:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 14:33:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2020-10-28 14:33:10,161 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 35 [2020-10-28 14:33:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:10,162 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2020-10-28 14:33:10,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2020-10-28 14:33:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:10,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:10,162 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:10,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:33:10,162 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2023252357, now seen corresponding path program 7 times [2020-10-28 14:33:10,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:10,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593593789] [2020-10-28 14:33:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:10,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:10,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:10,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:10,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:10,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-28 14:33:10,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:10,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:10,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:33:10,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:10,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:10,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:10,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:10,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:10,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593593789] [2020-10-28 14:33:10,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:10,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:10,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647722964] [2020-10-28 14:33:10,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:10,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:10,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:10,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:10,865 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 13 states. [2020-10-28 14:33:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:11,758 INFO L93 Difference]: Finished difference Result 195 states and 226 transitions. [2020-10-28 14:33:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:33:11,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:33:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:11,760 INFO L225 Difference]: With dead ends: 195 [2020-10-28 14:33:11,760 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 14:33:11,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:33:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 14:33:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 127. [2020-10-28 14:33:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 14:33:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-10-28 14:33:11,779 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 35 [2020-10-28 14:33:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:11,780 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-10-28 14:33:11,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-10-28 14:33:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:11,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:11,780 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:11,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:33:11,781 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1600550531, now seen corresponding path program 8 times [2020-10-28 14:33:11,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:11,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997476865] [2020-10-28 14:33:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:11,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:12,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:12,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:12,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:12,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-28 14:33:12,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:12,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:33:12,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:12,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:12,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:12,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:12,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:12,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:12,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:12,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:12,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:12,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:12,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:12,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997476865] [2020-10-28 14:33:12,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:12,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633253493] [2020-10-28 14:33:12,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:12,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:12,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:12,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:12,652 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 13 states. [2020-10-28 14:33:13,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:13,519 INFO L93 Difference]: Finished difference Result 165 states and 190 transitions. [2020-10-28 14:33:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:33:13,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:33:13,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:13,521 INFO L225 Difference]: With dead ends: 165 [2020-10-28 14:33:13,521 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 14:33:13,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:33:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 14:33:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2020-10-28 14:33:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 14:33:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2020-10-28 14:33:13,540 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 35 [2020-10-28 14:33:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:13,541 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2020-10-28 14:33:13,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2020-10-28 14:33:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:13,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:13,542 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:13,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 14:33:13,542 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:13,542 INFO L82 PathProgramCache]: Analyzing trace with hash 273188615, now seen corresponding path program 6 times [2020-10-28 14:33:13,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:13,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497692786] [2020-10-28 14:33:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:13,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:13,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:14,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:14,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:14,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:14,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1095 [2020-10-28 14:33:14,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:14,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:14,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:33:14,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:14,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:33:14,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:15,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:15,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:15,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:15,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:15,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:15,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:15,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:15,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:15,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:15,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:15,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:15,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497692786] [2020-10-28 14:33:15,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:15,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:15,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114233074] [2020-10-28 14:33:15,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:15,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:15,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:15,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:15,049 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand 13 states. [2020-10-28 14:33:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:16,220 INFO L93 Difference]: Finished difference Result 200 states and 232 transitions. [2020-10-28 14:33:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:33:16,220 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-28 14:33:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:16,221 INFO L225 Difference]: With dead ends: 200 [2020-10-28 14:33:16,222 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 14:33:16,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 14:33:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 147. [2020-10-28 14:33:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 14:33:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 168 transitions. [2020-10-28 14:33:16,243 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 168 transitions. Word has length 35 [2020-10-28 14:33:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:16,243 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 168 transitions. [2020-10-28 14:33:16,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 168 transitions. [2020-10-28 14:33:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:33:16,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:16,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:16,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 14:33:16,244 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:16,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1877773661, now seen corresponding path program 3 times [2020-10-28 14:33:16,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:16,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778591425] [2020-10-28 14:33:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:16,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:16,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:33:17,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:17,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:17,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:17,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:17,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:17,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:17,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:17,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:17,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:17,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:17,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:17,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778591425] [2020-10-28 14:33:17,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:17,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:33:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529378752] [2020-10-28 14:33:17,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:33:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:33:17,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:33:17,525 INFO L87 Difference]: Start difference. First operand 147 states and 168 transitions. Second operand 12 states. [2020-10-28 14:33:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:18,259 INFO L93 Difference]: Finished difference Result 206 states and 239 transitions. [2020-10-28 14:33:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:33:18,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:33:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:18,261 INFO L225 Difference]: With dead ends: 206 [2020-10-28 14:33:18,261 INFO L226 Difference]: Without dead ends: 188 [2020-10-28 14:33:18,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:33:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-28 14:33:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2020-10-28 14:33:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 14:33:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2020-10-28 14:33:18,285 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 35 [2020-10-28 14:33:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:18,285 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2020-10-28 14:33:18,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:33:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2020-10-28 14:33:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:18,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:18,286 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:18,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 14:33:18,286 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:18,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1841656302, now seen corresponding path program 7 times [2020-10-28 14:33:18,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:18,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114748171] [2020-10-28 14:33:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:18,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:18,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:18,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:18,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:18,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-28 14:33:18,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:18,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:18,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:33:18,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:33:18,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:18,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:18,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:18,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:18,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:18,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:18,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:18,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:18,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:18,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:18,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:18,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:18,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:33:18,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114748171] [2020-10-28 14:33:18,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:18,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:33:18,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206144713] [2020-10-28 14:33:18,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:33:18,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:18,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:33:18,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:33:18,738 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand 11 states. [2020-10-28 14:33:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:19,245 INFO L93 Difference]: Finished difference Result 167 states and 190 transitions. [2020-10-28 14:33:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:33:19,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-28 14:33:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:19,247 INFO L225 Difference]: With dead ends: 167 [2020-10-28 14:33:19,247 INFO L226 Difference]: Without dead ends: 136 [2020-10-28 14:33:19,248 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 [2020-10-28 14:33:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-28 14:33:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-28 14:33:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 14:33:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2020-10-28 14:33:19,272 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 38 [2020-10-28 14:33:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:19,272 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2020-10-28 14:33:19,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:33:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2020-10-28 14:33:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:19,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:19,273 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:19,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 14:33:19,274 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:19,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:19,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1146077682, now seen corresponding path program 9 times [2020-10-28 14:33:19,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:19,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88504224] [2020-10-28 14:33:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:19,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:19,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:19,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:19,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-28 14:33:19,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:19,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:19,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:19,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:19,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:33:19,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:20,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:20,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:20,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:20,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:20,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:20,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:20,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:20,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:20,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:20,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:20,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:20,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:20,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88504224] [2020-10-28 14:33:20,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:20,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:20,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223696750] [2020-10-28 14:33:20,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:20,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:20,207 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand 13 states. [2020-10-28 14:33:21,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:21,537 INFO L93 Difference]: Finished difference Result 198 states and 229 transitions. [2020-10-28 14:33:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:33:21,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 14:33:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:21,539 INFO L225 Difference]: With dead ends: 198 [2020-10-28 14:33:21,539 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 14:33:21,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:33:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 14:33:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-28 14:33:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:33:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2020-10-28 14:33:21,559 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 38 [2020-10-28 14:33:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:21,560 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2020-10-28 14:33:21,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2020-10-28 14:33:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:21,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:21,560 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:21,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 14:33:21,561 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash -530082960, now seen corresponding path program 9 times [2020-10-28 14:33:21,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:21,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932104249] [2020-10-28 14:33:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:21,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:22,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:22,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:22,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:22,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-28 14:33:22,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:22,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:22,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:22,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:22,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:22,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:23,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:23,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:23,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:23,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:23,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:23,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:33:23,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:23,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:23,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932104249] [2020-10-28 14:33:23,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:23,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:33:23,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390731102] [2020-10-28 14:33:23,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:33:23,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:23,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:33:23,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:33:23,318 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand 13 states. [2020-10-28 14:33:24,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:24,689 INFO L93 Difference]: Finished difference Result 184 states and 210 transitions. [2020-10-28 14:33:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:33:24,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 14:33:24,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:24,691 INFO L225 Difference]: With dead ends: 184 [2020-10-28 14:33:24,691 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 14:33:24,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:33:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 14:33:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-28 14:33:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 14:33:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2020-10-28 14:33:24,712 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 38 [2020-10-28 14:33:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:24,712 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2020-10-28 14:33:24,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:33:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2020-10-28 14:33:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:24,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:24,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:24,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 14:33:24,713 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1059314202, now seen corresponding path program 10 times [2020-10-28 14:33:24,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:24,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137497061] [2020-10-28 14:33:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:24,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:24,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:26,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:26,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:26,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:26,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2092 [2020-10-28 14:33:26,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:26,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:26,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:33:26,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:26,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:26,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:27,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:27,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:27,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:27,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137497061] [2020-10-28 14:33:27,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:27,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:33:27,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354225904] [2020-10-28 14:33:27,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:33:27,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:27,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:33:27,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:27,225 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand 14 states. [2020-10-28 14:33:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:28,374 INFO L93 Difference]: Finished difference Result 243 states and 277 transitions. [2020-10-28 14:33:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:33:28,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:33:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:28,376 INFO L225 Difference]: With dead ends: 243 [2020-10-28 14:33:28,377 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 14:33:28,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:33:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 14:33:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-10-28 14:33:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:33:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2020-10-28 14:33:28,403 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 38 [2020-10-28 14:33:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:28,404 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2020-10-28 14:33:28,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:33:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2020-10-28 14:33:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:28,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:28,405 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:28,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 14:33:28,405 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1091648074, now seen corresponding path program 10 times [2020-10-28 14:33:28,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:28,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160401102] [2020-10-28 14:33:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:28,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:28,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:29,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:29,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:29,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:29,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:29,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:29,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:29,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:29,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:29,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160401102] [2020-10-28 14:33:29,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:29,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:33:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376380346] [2020-10-28 14:33:29,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:33:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:29,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:33:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:29,154 INFO L87 Difference]: Start difference. First operand 162 states and 185 transitions. Second operand 14 states. [2020-10-28 14:33:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:30,287 INFO L93 Difference]: Finished difference Result 222 states and 254 transitions. [2020-10-28 14:33:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:30,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:33:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:30,289 INFO L225 Difference]: With dead ends: 222 [2020-10-28 14:33:30,290 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 14:33:30,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:33:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 14:33:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 179. [2020-10-28 14:33:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 14:33:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2020-10-28 14:33:30,319 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 38 [2020-10-28 14:33:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:30,319 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2020-10-28 14:33:30,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:33:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2020-10-28 14:33:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:30,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:30,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:30,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 14:33:30,321 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 925300696, now seen corresponding path program 11 times [2020-10-28 14:33:30,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:30,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255320278] [2020-10-28 14:33:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:30,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:30,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:30,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2254 [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:32,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:33,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:33,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:33,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:33,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:33,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:33,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:33,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:33,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255320278] [2020-10-28 14:33:33,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:33,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:33:33,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041846009] [2020-10-28 14:33:33,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:33:33,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:33,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:33:33,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:33,123 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand 14 states. [2020-10-28 14:33:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:34,439 INFO L93 Difference]: Finished difference Result 282 states and 323 transitions. [2020-10-28 14:33:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:33:34,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:33:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:34,441 INFO L225 Difference]: With dead ends: 282 [2020-10-28 14:33:34,441 INFO L226 Difference]: Without dead ends: 278 [2020-10-28 14:33:34,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:33:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-28 14:33:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 179. [2020-10-28 14:33:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 14:33:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2020-10-28 14:33:34,472 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 38 [2020-10-28 14:33:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:34,472 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2020-10-28 14:33:34,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:33:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2020-10-28 14:33:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:34,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:34,474 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:34,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 14:33:34,474 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:34,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1225661580, now seen corresponding path program 11 times [2020-10-28 14:33:34,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:34,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627139196] [2020-10-28 14:33:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:34,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:34,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:34,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:34,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:34,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-28 14:33:35,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:35,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:35,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:33:35,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:35,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:35,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:35,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:35,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:35,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:35,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:35,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627139196] [2020-10-28 14:33:35,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:35,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:33:35,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034148867] [2020-10-28 14:33:35,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:33:35,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:33:35,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:35,418 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand 14 states. [2020-10-28 14:33:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:36,354 INFO L93 Difference]: Finished difference Result 252 states and 291 transitions. [2020-10-28 14:33:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:33:36,355 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:33:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:36,356 INFO L225 Difference]: With dead ends: 252 [2020-10-28 14:33:36,356 INFO L226 Difference]: Without dead ends: 248 [2020-10-28 14:33:36,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:33:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-28 14:33:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 179. [2020-10-28 14:33:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 14:33:36,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2020-10-28 14:33:36,386 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 38 [2020-10-28 14:33:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:36,386 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2020-10-28 14:33:36,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:33:36,387 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2020-10-28 14:33:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:36,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:36,387 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:36,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 14:33:36,388 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:36,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1864288556, now seen corresponding path program 12 times [2020-10-28 14:33:36,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:36,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574582199] [2020-10-28 14:33:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:36,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:37,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:37,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:37,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:37,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-28 14:33:37,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:37,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:37,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:38,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:38,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:38,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:38,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:38,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:38,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:38,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:38,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:38,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:38,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574582199] [2020-10-28 14:33:38,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:38,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:33:38,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171275458] [2020-10-28 14:33:38,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:33:38,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:33:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:38,366 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand 14 states. [2020-10-28 14:33:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:39,850 INFO L93 Difference]: Finished difference Result 226 states and 260 transitions. [2020-10-28 14:33:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:33:39,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:33:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:39,852 INFO L225 Difference]: With dead ends: 226 [2020-10-28 14:33:39,853 INFO L226 Difference]: Without dead ends: 222 [2020-10-28 14:33:39,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:33:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-28 14:33:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 174. [2020-10-28 14:33:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 14:33:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2020-10-28 14:33:39,883 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 38 [2020-10-28 14:33:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:39,883 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2020-10-28 14:33:39,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:33:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2020-10-28 14:33:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:39,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:39,884 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:39,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 14:33:39,885 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:39,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:39,885 INFO L82 PathProgramCache]: Analyzing trace with hash -507450706, now seen corresponding path program 7 times [2020-10-28 14:33:39,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:39,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5311099] [2020-10-28 14:33:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:39,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:40,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:42,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:42,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:33:42,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2323 [2020-10-28 14:33:42,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:42,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:42,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:42,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:42,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:33:42,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:42,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:42,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:42,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:42,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:42,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:42,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:33:42,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:42,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:42,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:42,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5311099] [2020-10-28 14:33:42,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:42,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:33:42,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849728426] [2020-10-28 14:33:42,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:33:42,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:42,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:33:42,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:42,766 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand 14 states. [2020-10-28 14:33:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:43,862 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2020-10-28 14:33:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:33:43,863 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:33:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:43,864 INFO L225 Difference]: With dead ends: 236 [2020-10-28 14:33:43,864 INFO L226 Difference]: Without dead ends: 223 [2020-10-28 14:33:43,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:33:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-28 14:33:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 203. [2020-10-28 14:33:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 14:33:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 232 transitions. [2020-10-28 14:33:43,900 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 232 transitions. Word has length 38 [2020-10-28 14:33:43,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:43,900 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 232 transitions. [2020-10-28 14:33:43,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:33:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 232 transitions. [2020-10-28 14:33:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:43,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:43,902 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:43,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 14:33:43,903 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:43,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1636554314, now seen corresponding path program 4 times [2020-10-28 14:33:43,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:43,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834689475] [2020-10-28 14:33:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:43,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:44,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:44,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:44,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:44,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:44,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-28 14:33:44,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:44,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:44,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:33:44,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:44,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:44,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:45,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:45,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:45,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:45,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:45,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:45,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:45,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:45,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:45,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:45,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:45,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:45,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:45,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834689475] [2020-10-28 14:33:45,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:45,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:33:45,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821700274] [2020-10-28 14:33:45,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:33:45,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:45,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:33:45,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:33:45,335 INFO L87 Difference]: Start difference. First operand 203 states and 232 transitions. Second operand 14 states. [2020-10-28 14:33:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:46,461 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2020-10-28 14:33:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:33:46,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:33:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:46,463 INFO L225 Difference]: With dead ends: 226 [2020-10-28 14:33:46,463 INFO L226 Difference]: Without dead ends: 222 [2020-10-28 14:33:46,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:33:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-28 14:33:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 198. [2020-10-28 14:33:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-28 14:33:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 226 transitions. [2020-10-28 14:33:46,501 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 226 transitions. Word has length 38 [2020-10-28 14:33:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:46,501 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 226 transitions. [2020-10-28 14:33:46,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:33:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 226 transitions. [2020-10-28 14:33:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:46,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:46,503 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:46,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 14:33:46,503 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1081946456, now seen corresponding path program 13 times [2020-10-28 14:33:46,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:46,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122228016] [2020-10-28 14:33:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:46,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:47,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:47,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:47,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:47,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1154 [2020-10-28 14:33:47,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:47,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:33:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:47,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:47,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:48,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:48,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:48,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:48,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:48,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:48,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:48,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:48,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122228016] [2020-10-28 14:33:48,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:48,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:48,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760669934] [2020-10-28 14:33:48,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:48,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:48,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:48,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:48,198 INFO L87 Difference]: Start difference. First operand 198 states and 226 transitions. Second operand 15 states. [2020-10-28 14:33:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:49,653 INFO L93 Difference]: Finished difference Result 318 states and 365 transitions. [2020-10-28 14:33:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:49,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-28 14:33:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:49,656 INFO L225 Difference]: With dead ends: 318 [2020-10-28 14:33:49,656 INFO L226 Difference]: Without dead ends: 314 [2020-10-28 14:33:49,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:33:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-28 14:33:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 206. [2020-10-28 14:33:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-28 14:33:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 239 transitions. [2020-10-28 14:33:49,685 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 239 transitions. Word has length 38 [2020-10-28 14:33:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:49,685 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 239 transitions. [2020-10-28 14:33:49,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 239 transitions. [2020-10-28 14:33:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:33:49,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:49,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:49,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 14:33:49,687 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash 947932950, now seen corresponding path program 8 times [2020-10-28 14:33:49,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:49,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132374263] [2020-10-28 14:33:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:49,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:49,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:33:50,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:51,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:51,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:51,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:51,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:51,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132374263] [2020-10-28 14:33:51,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:51,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:51,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478744009] [2020-10-28 14:33:51,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:51,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:51,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:51,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:51,280 INFO L87 Difference]: Start difference. First operand 206 states and 239 transitions. Second operand 15 states. [2020-10-28 14:33:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:52,783 INFO L93 Difference]: Finished difference Result 284 states and 328 transitions. [2020-10-28 14:33:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:52,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-28 14:33:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:52,785 INFO L225 Difference]: With dead ends: 284 [2020-10-28 14:33:52,785 INFO L226 Difference]: Without dead ends: 280 [2020-10-28 14:33:52,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:33:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-28 14:33:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 180. [2020-10-28 14:33:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 14:33:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-10-28 14:33:52,819 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 38 [2020-10-28 14:33:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:52,819 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-10-28 14:33:52,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-10-28 14:33:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:33:52,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:52,821 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:33:52,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 14:33:52,821 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2080950845, now seen corresponding path program 3 times [2020-10-28 14:33:52,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:52,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156121069] [2020-10-28 14:33:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:52,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:53,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:53,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:33:53,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:53,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-28 14:33:53,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:53,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:53,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:53,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:53,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:33:53,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:54,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:54,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:54,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156121069] [2020-10-28 14:33:54,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:54,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:54,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662696938] [2020-10-28 14:33:54,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:54,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:54,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:54,121 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 15 states. [2020-10-28 14:33:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:55,174 INFO L93 Difference]: Finished difference Result 285 states and 325 transitions. [2020-10-28 14:33:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:33:55,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:33:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:55,176 INFO L225 Difference]: With dead ends: 285 [2020-10-28 14:33:55,177 INFO L226 Difference]: Without dead ends: 281 [2020-10-28 14:33:55,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:33:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-28 14:33:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 181. [2020-10-28 14:33:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 14:33:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2020-10-28 14:33:55,215 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 41 [2020-10-28 14:33:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:55,215 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2020-10-28 14:33:55,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2020-10-28 14:33:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:33:55,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:55,216 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-28 14:33:55,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 14:33:55,217 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2080002945, now seen corresponding path program 12 times [2020-10-28 14:33:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:55,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15570348] [2020-10-28 14:33:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:55,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:56,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:56,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:33:56,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:33:56,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-28 14:33:56,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:56,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:33:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:33:56,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:56,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:56,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:56,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:56,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:56,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:56,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:33:56,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:56,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:56,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:56,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:56,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:56,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:56,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15570348] [2020-10-28 14:33:56,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:56,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:56,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232673732] [2020-10-28 14:33:56,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:56,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:56,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:56,766 INFO L87 Difference]: Start difference. First operand 181 states and 206 transitions. Second operand 15 states. [2020-10-28 14:33:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:33:57,932 INFO L93 Difference]: Finished difference Result 271 states and 311 transitions. [2020-10-28 14:33:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:33:57,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:33:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:33:57,934 INFO L225 Difference]: With dead ends: 271 [2020-10-28 14:33:57,934 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 14:33:57,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:33:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 14:33:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2020-10-28 14:33:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 14:33:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-10-28 14:33:57,972 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 41 [2020-10-28 14:33:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:33:57,973 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-10-28 14:33:57,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:33:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-10-28 14:33:57,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:33:57,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:33:57,974 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-28 14:33:57,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 14:33:57,974 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:33:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:33:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash -157722811, now seen corresponding path program 13 times [2020-10-28 14:33:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:33:57,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904450467] [2020-10-28 14:33:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:33:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:58,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:58,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:58,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:33:58,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:58,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-28 14:33:58,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:58,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:58,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:33:58,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:33:58,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:33:58,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:59,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:33:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:33:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:33:59,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:33:59,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:33:59,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:33:59,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:33:59,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:33:59,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:33:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:33:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:33:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:33:59,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:33:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:33:59,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904450467] [2020-10-28 14:33:59,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:33:59,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:33:59,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789183952] [2020-10-28 14:33:59,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:33:59,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:33:59,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:33:59,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:33:59,388 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 15 states. [2020-10-28 14:34:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:00,492 INFO L93 Difference]: Finished difference Result 267 states and 304 transitions. [2020-10-28 14:34:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:34:00,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:34:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:00,494 INFO L225 Difference]: With dead ends: 267 [2020-10-28 14:34:00,494 INFO L226 Difference]: Without dead ends: 249 [2020-10-28 14:34:00,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:34:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-28 14:34:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 189. [2020-10-28 14:34:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-28 14:34:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 215 transitions. [2020-10-28 14:34:00,529 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 215 transitions. Word has length 41 [2020-10-28 14:34:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:00,530 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 215 transitions. [2020-10-28 14:34:00,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 215 transitions. [2020-10-28 14:34:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:00,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:00,531 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:00,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 14:34:00,531 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash 786831781, now seen corresponding path program 14 times [2020-10-28 14:34:00,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:00,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641911486] [2020-10-28 14:34:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:00,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:00,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:01,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:01,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:01,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-28 14:34:01,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:01,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:34:01,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:01,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:01,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:01,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:34:01,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641911486] [2020-10-28 14:34:01,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:01,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:34:01,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688019764] [2020-10-28 14:34:01,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:34:01,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:01,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:34:01,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:34:01,679 INFO L87 Difference]: Start difference. First operand 189 states and 215 transitions. Second operand 12 states. [2020-10-28 14:34:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:02,386 INFO L93 Difference]: Finished difference Result 219 states and 249 transitions. [2020-10-28 14:34:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:34:02,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-28 14:34:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:02,388 INFO L225 Difference]: With dead ends: 219 [2020-10-28 14:34:02,388 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 14:34:02,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:34:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 14:34:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-28 14:34:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 14:34:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 205 transitions. [2020-10-28 14:34:02,422 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 205 transitions. Word has length 41 [2020-10-28 14:34:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:02,422 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 205 transitions. [2020-10-28 14:34:02,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:34:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 205 transitions. [2020-10-28 14:34:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:02,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:02,423 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:02,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 14:34:02,424 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1496753477, now seen corresponding path program 15 times [2020-10-28 14:34:02,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:02,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158195066] [2020-10-28 14:34:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:02,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:02,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:03,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:03,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:03,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:03,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1113 [2020-10-28 14:34:03,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:03,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:34:03,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:04,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:04,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:04,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:04,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:04,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158195066] [2020-10-28 14:34:04,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:04,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:04,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380388781] [2020-10-28 14:34:04,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:04,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:04,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:04,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:04,127 INFO L87 Difference]: Start difference. First operand 180 states and 205 transitions. Second operand 15 states. [2020-10-28 14:34:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:05,667 INFO L93 Difference]: Finished difference Result 286 states and 326 transitions. [2020-10-28 14:34:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:34:05,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:34:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:05,669 INFO L225 Difference]: With dead ends: 286 [2020-10-28 14:34:05,669 INFO L226 Difference]: Without dead ends: 273 [2020-10-28 14:34:05,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:34:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-28 14:34:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 240. [2020-10-28 14:34:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-28 14:34:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 273 transitions. [2020-10-28 14:34:05,717 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 273 transitions. Word has length 41 [2020-10-28 14:34:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:05,717 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 273 transitions. [2020-10-28 14:34:05,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 273 transitions. [2020-10-28 14:34:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:05,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:05,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:05,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 14:34:05,719 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash 647251543, now seen corresponding path program 14 times [2020-10-28 14:34:05,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:05,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571678936] [2020-10-28 14:34:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:05,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:05,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:06,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:07,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:34:07,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1722 [2020-10-28 14:34:07,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:07,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:07,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:07,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:07,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:07,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:07,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:07,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:07,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:07,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:07,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:07,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:07,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571678936] [2020-10-28 14:34:07,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:07,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:07,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579911692] [2020-10-28 14:34:07,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:07,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:07,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:07,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:07,866 INFO L87 Difference]: Start difference. First operand 240 states and 273 transitions. Second operand 15 states. [2020-10-28 14:34:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:09,295 INFO L93 Difference]: Finished difference Result 273 states and 309 transitions. [2020-10-28 14:34:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:34:09,295 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:34:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:09,297 INFO L225 Difference]: With dead ends: 273 [2020-10-28 14:34:09,297 INFO L226 Difference]: Without dead ends: 269 [2020-10-28 14:34:09,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:34:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-28 14:34:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 203. [2020-10-28 14:34:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 14:34:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 232 transitions. [2020-10-28 14:34:09,328 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 232 transitions. Word has length 41 [2020-10-28 14:34:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:09,329 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 232 transitions. [2020-10-28 14:34:09,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 232 transitions. [2020-10-28 14:34:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:09,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:09,330 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-28 14:34:09,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 14:34:09,330 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:09,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2058318591, now seen corresponding path program 15 times [2020-10-28 14:34:09,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:09,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746324572] [2020-10-28 14:34:09,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:09,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:09,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:09,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:09,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-28 14:34:09,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:09,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:34:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:09,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:10,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:10,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:10,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:10,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:10,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:10,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:10,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:10,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:10,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:10,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:10,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746324572] [2020-10-28 14:34:10,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:10,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:10,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750139241] [2020-10-28 14:34:10,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:10,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:10,532 INFO L87 Difference]: Start difference. First operand 203 states and 232 transitions. Second operand 15 states. [2020-10-28 14:34:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:12,083 INFO L93 Difference]: Finished difference Result 269 states and 307 transitions. [2020-10-28 14:34:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:34:12,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:34:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:12,086 INFO L225 Difference]: With dead ends: 269 [2020-10-28 14:34:12,086 INFO L226 Difference]: Without dead ends: 265 [2020-10-28 14:34:12,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:34:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-28 14:34:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 204. [2020-10-28 14:34:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 14:34:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 234 transitions. [2020-10-28 14:34:12,130 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 234 transitions. Word has length 41 [2020-10-28 14:34:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:12,131 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 234 transitions. [2020-10-28 14:34:12,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 234 transitions. [2020-10-28 14:34:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:12,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:12,132 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:12,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 14:34:12,132 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:12,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:12,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2102635199, now seen corresponding path program 16 times [2020-10-28 14:34:12,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:12,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961852277] [2020-10-28 14:34:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:13,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:13,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-28 14:34:13,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:34:13,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:13,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:13,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:13,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:13,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:13,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:13,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:13,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961852277] [2020-10-28 14:34:13,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:13,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178207898] [2020-10-28 14:34:13,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:13,819 INFO L87 Difference]: Start difference. First operand 204 states and 234 transitions. Second operand 15 states. [2020-10-28 14:34:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:15,131 INFO L93 Difference]: Finished difference Result 242 states and 277 transitions. [2020-10-28 14:34:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:34:15,131 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:34:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:15,133 INFO L225 Difference]: With dead ends: 242 [2020-10-28 14:34:15,133 INFO L226 Difference]: Without dead ends: 238 [2020-10-28 14:34:15,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:34:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-28 14:34:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 187. [2020-10-28 14:34:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 14:34:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 214 transitions. [2020-10-28 14:34:15,176 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 214 transitions. Word has length 41 [2020-10-28 14:34:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:15,176 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 214 transitions. [2020-10-28 14:34:15,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 214 transitions. [2020-10-28 14:34:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:15,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:15,179 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:15,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-28 14:34:15,179 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash 426474557, now seen corresponding path program 16 times [2020-10-28 14:34:15,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:15,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018915177] [2020-10-28 14:34:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:15,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:15,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:16,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:16,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:16,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:16,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-28 14:34:16,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:16,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:16,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:16,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:16,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:16,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:16,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:16,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:16,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:16,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:16,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:16,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:16,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:16,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:16,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:16,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:16,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018915177] [2020-10-28 14:34:16,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:16,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959516838] [2020-10-28 14:34:16,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:16,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:16,965 INFO L87 Difference]: Start difference. First operand 187 states and 214 transitions. Second operand 15 states. [2020-10-28 14:34:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:18,766 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2020-10-28 14:34:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:34:18,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:34:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:18,768 INFO L225 Difference]: With dead ends: 305 [2020-10-28 14:34:18,768 INFO L226 Difference]: Without dead ends: 301 [2020-10-28 14:34:18,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:34:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-28 14:34:18,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 240. [2020-10-28 14:34:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-28 14:34:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 273 transitions. [2020-10-28 14:34:18,821 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 273 transitions. Word has length 41 [2020-10-28 14:34:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:18,821 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 273 transitions. [2020-10-28 14:34:18,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 273 transitions. [2020-10-28 14:34:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:18,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:18,823 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:18,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-28 14:34:18,823 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:18,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1724487719, now seen corresponding path program 17 times [2020-10-28 14:34:18,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:18,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46792551] [2020-10-28 14:34:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:18,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:19,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:19,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:19,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:19,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-28 14:34:19,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:19,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:19,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:19,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:19,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:19,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:20,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:20,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:20,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:20,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:20,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:20,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:20,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:20,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:20,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:20,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:20,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:20,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:20,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46792551] [2020-10-28 14:34:20,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:20,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:34:20,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961184721] [2020-10-28 14:34:20,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:34:20,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:34:20,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:34:20,574 INFO L87 Difference]: Start difference. First operand 240 states and 273 transitions. Second operand 14 states. [2020-10-28 14:34:22,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:22,307 INFO L93 Difference]: Finished difference Result 287 states and 329 transitions. [2020-10-28 14:34:22,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:34:22,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:34:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:22,309 INFO L225 Difference]: With dead ends: 287 [2020-10-28 14:34:22,309 INFO L226 Difference]: Without dead ends: 269 [2020-10-28 14:34:22,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:34:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-28 14:34:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 238. [2020-10-28 14:34:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 14:34:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 270 transitions. [2020-10-28 14:34:22,349 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 270 transitions. Word has length 41 [2020-10-28 14:34:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:22,350 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 270 transitions. [2020-10-28 14:34:22,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:34:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 270 transitions. [2020-10-28 14:34:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:22,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:22,351 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:22,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-28 14:34:22,351 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:22,351 INFO L82 PathProgramCache]: Analyzing trace with hash 691812969, now seen corresponding path program 17 times [2020-10-28 14:34:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:22,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647060225] [2020-10-28 14:34:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:22,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:22,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:22,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:34:22,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:23,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:23,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:34:23,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647060225] [2020-10-28 14:34:23,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:23,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:34:23,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296413526] [2020-10-28 14:34:23,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:34:23,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:34:23,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:34:23,212 INFO L87 Difference]: Start difference. First operand 238 states and 270 transitions. Second operand 13 states. [2020-10-28 14:34:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:24,010 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-10-28 14:34:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:34:24,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 14:34:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:24,012 INFO L225 Difference]: With dead ends: 263 [2020-10-28 14:34:24,012 INFO L226 Difference]: Without dead ends: 213 [2020-10-28 14:34:24,013 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 [2020-10-28 14:34:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-28 14:34:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-10-28 14:34:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 14:34:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 242 transitions. [2020-10-28 14:34:24,045 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 242 transitions. Word has length 41 [2020-10-28 14:34:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:24,045 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 242 transitions. [2020-10-28 14:34:24,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:34:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 242 transitions. [2020-10-28 14:34:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:24,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:24,046 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:24,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-28 14:34:24,046 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1819506531, now seen corresponding path program 18 times [2020-10-28 14:34:24,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:24,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399114890] [2020-10-28 14:34:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:24,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:25,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:34:25,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:26,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:26,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:26,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:26,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399114890] [2020-10-28 14:34:26,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:26,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:26,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447927114] [2020-10-28 14:34:26,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:26,026 INFO L87 Difference]: Start difference. First operand 213 states and 242 transitions. Second operand 15 states. [2020-10-28 14:34:26,827 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-28 14:34:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:28,270 INFO L93 Difference]: Finished difference Result 310 states and 356 transitions. [2020-10-28 14:34:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:34:28,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:34:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:28,273 INFO L225 Difference]: With dead ends: 310 [2020-10-28 14:34:28,273 INFO L226 Difference]: Without dead ends: 292 [2020-10-28 14:34:28,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:34:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-28 14:34:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 239. [2020-10-28 14:34:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-28 14:34:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 270 transitions. [2020-10-28 14:34:28,328 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 270 transitions. Word has length 41 [2020-10-28 14:34:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:28,329 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 270 transitions. [2020-10-28 14:34:28,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 270 transitions. [2020-10-28 14:34:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:28,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:28,330 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:28,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-28 14:34:28,330 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash 714445223, now seen corresponding path program 9 times [2020-10-28 14:34:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:28,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461367592] [2020-10-28 14:34:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:28,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:28,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:28,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:29,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:33,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4755 [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:33,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:33,427 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-28 14:34:33,616 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-28 14:34:33,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:33,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:33,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:34,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461367592] [2020-10-28 14:34:34,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:34,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:34:34,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562532241] [2020-10-28 14:34:34,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:34:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:34,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:34:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:34:34,020 INFO L87 Difference]: Start difference. First operand 239 states and 270 transitions. Second operand 15 states. [2020-10-28 14:34:34,525 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-28 14:34:34,755 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-28 14:34:34,902 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-28 14:34:35,125 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:34:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:36,589 INFO L93 Difference]: Finished difference Result 274 states and 311 transitions. [2020-10-28 14:34:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:34:36,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:34:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:36,591 INFO L225 Difference]: With dead ends: 274 [2020-10-28 14:34:36,591 INFO L226 Difference]: Without dead ends: 270 [2020-10-28 14:34:36,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:34:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-28 14:34:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 231. [2020-10-28 14:34:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-28 14:34:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2020-10-28 14:34:36,638 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 41 [2020-10-28 14:34:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:36,639 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2020-10-28 14:34:36,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:34:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2020-10-28 14:34:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:36,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:36,639 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:36,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-28 14:34:36,640 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:36,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1569140035, now seen corresponding path program 18 times [2020-10-28 14:34:36,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:36,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905516408] [2020-10-28 14:34:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:36,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:37,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:37,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:41,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4529 [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:41,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:41,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:41,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:41,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:41,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:41,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:41,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:41,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:41,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:41,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:41,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905516408] [2020-10-28 14:34:41,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:41,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:41,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530235036] [2020-10-28 14:34:41,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:41,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:41,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:41,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:41,828 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand 16 states. [2020-10-28 14:34:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:43,872 INFO L93 Difference]: Finished difference Result 365 states and 414 transitions. [2020-10-28 14:34:43,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:34:43,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:34:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:43,874 INFO L225 Difference]: With dead ends: 365 [2020-10-28 14:34:43,875 INFO L226 Difference]: Without dead ends: 361 [2020-10-28 14:34:43,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:34:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-28 14:34:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 287. [2020-10-28 14:34:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-28 14:34:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 326 transitions. [2020-10-28 14:34:43,923 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 326 transitions. Word has length 41 [2020-10-28 14:34:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:43,924 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 326 transitions. [2020-10-28 14:34:43,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 326 transitions. [2020-10-28 14:34:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:43,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:43,925 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:43,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-28 14:34:43,925 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash 574864985, now seen corresponding path program 19 times [2020-10-28 14:34:43,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:43,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295518164] [2020-10-28 14:34:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:43,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:45,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:45,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:45,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:45,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-28 14:34:45,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:45,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:45,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:45,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:45,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:45,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:45,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:45,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:45,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295518164] [2020-10-28 14:34:45,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:45,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:45,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348399833] [2020-10-28 14:34:45,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:45,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:45,615 INFO L87 Difference]: Start difference. First operand 287 states and 326 transitions. Second operand 16 states. [2020-10-28 14:34:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:47,419 INFO L93 Difference]: Finished difference Result 369 states and 420 transitions. [2020-10-28 14:34:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:34:47,419 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:34:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:47,421 INFO L225 Difference]: With dead ends: 369 [2020-10-28 14:34:47,421 INFO L226 Difference]: Without dead ends: 365 [2020-10-28 14:34:47,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:34:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-28 14:34:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 318. [2020-10-28 14:34:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-28 14:34:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 362 transitions. [2020-10-28 14:34:47,519 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 362 transitions. Word has length 41 [2020-10-28 14:34:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:47,519 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 362 transitions. [2020-10-28 14:34:47,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 362 transitions. [2020-10-28 14:34:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:47,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:47,520 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:47,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-28 14:34:47,521 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash 354087999, now seen corresponding path program 10 times [2020-10-28 14:34:47,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:47,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472823441] [2020-10-28 14:34:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:47,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:48,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:48,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:52,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:52,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:52,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:34:52,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:34:52,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:52,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:52,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:52,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:52,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:52,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:53,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:53,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:53,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:53,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:53,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:53,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:53,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:53,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:53,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:53,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:53,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472823441] [2020-10-28 14:34:53,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:53,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:53,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056011201] [2020-10-28 14:34:53,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:53,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:53,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:53,138 INFO L87 Difference]: Start difference. First operand 318 states and 362 transitions. Second operand 16 states. [2020-10-28 14:34:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:55,247 INFO L93 Difference]: Finished difference Result 464 states and 528 transitions. [2020-10-28 14:34:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:34:55,248 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:34:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:55,249 INFO L225 Difference]: With dead ends: 464 [2020-10-28 14:34:55,250 INFO L226 Difference]: Without dead ends: 460 [2020-10-28 14:34:55,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:34:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-28 14:34:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 318. [2020-10-28 14:34:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-28 14:34:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 362 transitions. [2020-10-28 14:34:55,301 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 362 transitions. Word has length 41 [2020-10-28 14:34:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:55,301 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 362 transitions. [2020-10-28 14:34:55,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 362 transitions. [2020-10-28 14:34:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:34:55,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:55,302 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:55,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-28 14:34:55,302 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:55,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1796874277, now seen corresponding path program 5 times [2020-10-28 14:34:55,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:55,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850768088] [2020-10-28 14:34:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:55,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:56,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:34:56,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:57,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:34:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:57,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:57,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:34:57,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:34:57,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:34:57,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:34:57,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:34:57,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:34:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:34:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:34:57,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:34:57,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:34:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:34:57,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850768088] [2020-10-28 14:34:57,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:34:57,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:34:57,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948114714] [2020-10-28 14:34:57,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:34:57,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:34:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:34:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:34:57,411 INFO L87 Difference]: Start difference. First operand 318 states and 362 transitions. Second operand 16 states. [2020-10-28 14:34:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:34:59,006 INFO L93 Difference]: Finished difference Result 430 states and 493 transitions. [2020-10-28 14:34:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:34:59,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-28 14:34:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:34:59,009 INFO L225 Difference]: With dead ends: 430 [2020-10-28 14:34:59,009 INFO L226 Difference]: Without dead ends: 426 [2020-10-28 14:34:59,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:34:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-28 14:34:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 318. [2020-10-28 14:34:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-28 14:34:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 362 transitions. [2020-10-28 14:34:59,064 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 362 transitions. Word has length 41 [2020-10-28 14:34:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:34:59,065 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 362 transitions. [2020-10-28 14:34:59,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:34:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 362 transitions. [2020-10-28 14:34:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:34:59,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:34:59,066 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:34:59,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-28 14:34:59,066 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:34:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:34:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash 461179514, now seen corresponding path program 19 times [2020-10-28 14:34:59,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:34:59,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541005355] [2020-10-28 14:34:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:34:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:34:59,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:59,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:34:59,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:01,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:01,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:01,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:01,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2268 [2020-10-28 14:35:01,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:01,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:35:01,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:02,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:02,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:02,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:02,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:02,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:02,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:02,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:02,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:02,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:02,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:02,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541005355] [2020-10-28 14:35:02,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:02,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:02,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331996995] [2020-10-28 14:35:02,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:02,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:02,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:02,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:02,108 INFO L87 Difference]: Start difference. First operand 318 states and 362 transitions. Second operand 16 states. [2020-10-28 14:35:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:04,305 INFO L93 Difference]: Finished difference Result 365 states and 417 transitions. [2020-10-28 14:35:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:35:04,306 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:35:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:04,308 INFO L225 Difference]: With dead ends: 365 [2020-10-28 14:35:04,308 INFO L226 Difference]: Without dead ends: 361 [2020-10-28 14:35:04,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:35:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-28 14:35:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 297. [2020-10-28 14:35:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-28 14:35:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 340 transitions. [2020-10-28 14:35:04,372 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 340 transitions. Word has length 44 [2020-10-28 14:35:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:04,372 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 340 transitions. [2020-10-28 14:35:04,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 340 transitions. [2020-10-28 14:35:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:04,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:04,373 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:04,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-28 14:35:04,373 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 321599276, now seen corresponding path program 20 times [2020-10-28 14:35:04,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:04,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869607932] [2020-10-28 14:35:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:04,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:04,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:05,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:07,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:07,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:07,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:07,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2653 [2020-10-28 14:35:07,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:07,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:07,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:35:07,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:07,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:35:07,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:07,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:07,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:07,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:07,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:07,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:07,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:07,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:07,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:07,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:07,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:07,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:07,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869607932] [2020-10-28 14:35:07,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:07,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:07,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086733639] [2020-10-28 14:35:07,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:07,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:07,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:07,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:07,706 INFO L87 Difference]: Start difference. First operand 297 states and 340 transitions. Second operand 17 states. [2020-10-28 14:35:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:09,610 INFO L93 Difference]: Finished difference Result 457 states and 517 transitions. [2020-10-28 14:35:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:35:09,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:35:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:09,613 INFO L225 Difference]: With dead ends: 457 [2020-10-28 14:35:09,613 INFO L226 Difference]: Without dead ends: 453 [2020-10-28 14:35:09,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:35:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-28 14:35:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 313. [2020-10-28 14:35:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-28 14:35:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 358 transitions. [2020-10-28 14:35:09,670 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 358 transitions. Word has length 44 [2020-10-28 14:35:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:09,670 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 358 transitions. [2020-10-28 14:35:09,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 358 transitions. [2020-10-28 14:35:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:09,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:09,671 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:09,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-28 14:35:09,671 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:09,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:09,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2050139986, now seen corresponding path program 21 times [2020-10-28 14:35:09,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:09,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435469037] [2020-10-28 14:35:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:09,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:10,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:12,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3138 [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:35:12,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:13,282 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-28 14:35:13,420 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-28 14:35:13,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:13,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:13,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:13,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:13,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:13,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:13,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:13,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:13,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435469037] [2020-10-28 14:35:13,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:13,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:13,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899510480] [2020-10-28 14:35:13,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:13,687 INFO L87 Difference]: Start difference. First operand 313 states and 358 transitions. Second operand 17 states. [2020-10-28 14:35:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:15,594 INFO L93 Difference]: Finished difference Result 400 states and 458 transitions. [2020-10-28 14:35:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:35:15,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:35:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:15,598 INFO L225 Difference]: With dead ends: 400 [2020-10-28 14:35:15,598 INFO L226 Difference]: Without dead ends: 396 [2020-10-28 14:35:15,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:35:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-28 14:35:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2020-10-28 14:35:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-28 14:35:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 295 transitions. [2020-10-28 14:35:15,667 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 295 transitions. Word has length 44 [2020-10-28 14:35:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:15,668 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 295 transitions. [2020-10-28 14:35:15,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 295 transitions. [2020-10-28 14:35:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:15,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:15,669 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:15,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-28 14:35:15,669 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:15,670 INFO L82 PathProgramCache]: Analyzing trace with hash 483811768, now seen corresponding path program 20 times [2020-10-28 14:35:15,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:15,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608155472] [2020-10-28 14:35:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:15,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:15,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:16,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:18,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:18,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:18,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:18,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2857 [2020-10-28 14:35:18,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:18,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:18,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:35:18,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:19,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:19,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:19,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:19,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:19,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:19,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:19,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:19,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:19,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:19,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:19,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:19,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:19,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608155472] [2020-10-28 14:35:19,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:19,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:19,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880451527] [2020-10-28 14:35:19,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:19,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:19,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:19,297 INFO L87 Difference]: Start difference. First operand 258 states and 295 transitions. Second operand 16 states. [2020-10-28 14:35:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:21,467 INFO L93 Difference]: Finished difference Result 347 states and 395 transitions. [2020-10-28 14:35:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:35:21,468 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:35:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:21,469 INFO L225 Difference]: With dead ends: 347 [2020-10-28 14:35:21,469 INFO L226 Difference]: Without dead ends: 334 [2020-10-28 14:35:21,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:35:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-28 14:35:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 298. [2020-10-28 14:35:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-28 14:35:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 338 transitions. [2020-10-28 14:35:21,522 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 338 transitions. Word has length 44 [2020-10-28 14:35:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:21,523 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 338 transitions. [2020-10-28 14:35:21,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 338 transitions. [2020-10-28 14:35:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:21,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:21,524 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:21,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-28 14:35:21,524 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:21,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1667150508, now seen corresponding path program 22 times [2020-10-28 14:35:21,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:21,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405972920] [2020-10-28 14:35:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:21,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:21,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:22,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:22,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:22,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-28 14:35:22,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:22,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:35:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:23,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:23,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:23,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:23,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:23,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:23,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:35:23,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:23,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:23,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:23,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:23,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:23,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405972920] [2020-10-28 14:35:23,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:23,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:23,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249446306] [2020-10-28 14:35:23,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:23,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:23,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:23,392 INFO L87 Difference]: Start difference. First operand 298 states and 338 transitions. Second operand 16 states. [2020-10-28 14:35:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:25,644 INFO L93 Difference]: Finished difference Result 337 states and 381 transitions. [2020-10-28 14:35:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:35:25,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:35:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:25,648 INFO L225 Difference]: With dead ends: 337 [2020-10-28 14:35:25,648 INFO L226 Difference]: Without dead ends: 333 [2020-10-28 14:35:25,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:35:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-28 14:35:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 298. [2020-10-28 14:35:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-28 14:35:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 338 transitions. [2020-10-28 14:35:25,704 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 338 transitions. Word has length 44 [2020-10-28 14:35:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:25,704 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 338 transitions. [2020-10-28 14:35:25,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 338 transitions. [2020-10-28 14:35:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:25,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:25,705 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:25,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-28 14:35:25,705 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:25,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1799773490, now seen corresponding path program 21 times [2020-10-28 14:35:25,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:25,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110511704] [2020-10-28 14:35:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:25,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:26,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:27,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:27,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:27,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1783 [2020-10-28 14:35:27,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:27,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:27,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:35:27,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:27,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:35:27,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:28,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:28,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:28,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:28,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:28,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:28,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:28,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:28,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:28,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:28,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110511704] [2020-10-28 14:35:28,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:28,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:28,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505542773] [2020-10-28 14:35:28,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:28,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:28,390 INFO L87 Difference]: Start difference. First operand 298 states and 338 transitions. Second operand 17 states. [2020-10-28 14:35:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:30,675 INFO L93 Difference]: Finished difference Result 445 states and 507 transitions. [2020-10-28 14:35:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:35:30,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:35:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:30,677 INFO L225 Difference]: With dead ends: 445 [2020-10-28 14:35:30,677 INFO L226 Difference]: Without dead ends: 441 [2020-10-28 14:35:30,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:35:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-28 14:35:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 360. [2020-10-28 14:35:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-28 14:35:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 412 transitions. [2020-10-28 14:35:30,743 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 412 transitions. Word has length 44 [2020-10-28 14:35:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:30,743 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 412 transitions. [2020-10-28 14:35:30,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 412 transitions. [2020-10-28 14:35:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:30,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:30,744 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:30,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-28 14:35:30,744 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash 344231530, now seen corresponding path program 23 times [2020-10-28 14:35:30,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:30,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591846760] [2020-10-28 14:35:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:30,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:31,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:32,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:32,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:32,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:32,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1531 [2020-10-28 14:35:32,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:32,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:35:32,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:33,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:33,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:33,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:33,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:33,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:33,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:33,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:33,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:33,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:33,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:33,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:33,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:33,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591846760] [2020-10-28 14:35:33,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:33,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:35:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163365407] [2020-10-28 14:35:33,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:35:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:35:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:35:33,158 INFO L87 Difference]: Start difference. First operand 360 states and 412 transitions. Second operand 16 states. [2020-10-28 14:35:33,996 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-28 14:35:34,165 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-28 14:35:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:34,993 INFO L93 Difference]: Finished difference Result 440 states and 503 transitions. [2020-10-28 14:35:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:35:34,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-28 14:35:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:34,996 INFO L225 Difference]: With dead ends: 440 [2020-10-28 14:35:34,996 INFO L226 Difference]: Without dead ends: 422 [2020-10-28 14:35:34,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:35:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-28 14:35:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 336. [2020-10-28 14:35:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-28 14:35:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 385 transitions. [2020-10-28 14:35:35,058 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 385 transitions. Word has length 44 [2020-10-28 14:35:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:35,058 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 385 transitions. [2020-10-28 14:35:35,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:35:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 385 transitions. [2020-10-28 14:35:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:35,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:35,059 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:35,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-28 14:35:35,059 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash 123454544, now seen corresponding path program 22 times [2020-10-28 14:35:35,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:35,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395849729] [2020-10-28 14:35:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:35,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:35,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:37,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:37,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:37,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:37,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2006 [2020-10-28 14:35:37,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:37,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:35:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:35:37,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:37,560 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-28 14:35:37,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:37,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:37,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395849729] [2020-10-28 14:35:37,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:37,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:37,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006213652] [2020-10-28 14:35:37,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:37,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:37,921 INFO L87 Difference]: Start difference. First operand 336 states and 385 transitions. Second operand 17 states. [2020-10-28 14:35:38,884 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-28 14:35:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:40,566 INFO L93 Difference]: Finished difference Result 433 states and 494 transitions. [2020-10-28 14:35:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:35:40,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:35:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:40,568 INFO L225 Difference]: With dead ends: 433 [2020-10-28 14:35:40,568 INFO L226 Difference]: Without dead ends: 429 [2020-10-28 14:35:40,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:35:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-28 14:35:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 302. [2020-10-28 14:35:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-28 14:35:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 341 transitions. [2020-10-28 14:35:40,630 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 341 transitions. Word has length 44 [2020-10-28 14:35:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:40,630 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 341 transitions. [2020-10-28 14:35:40,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 341 transitions. [2020-10-28 14:35:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:40,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:40,631 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:40,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-28 14:35:40,631 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:40,631 INFO L82 PathProgramCache]: Analyzing trace with hash 22251302, now seen corresponding path program 24 times [2020-10-28 14:35:40,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:40,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077317176] [2020-10-28 14:35:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:40,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:40,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:43,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:43,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:43,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:35:43,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2519 [2020-10-28 14:35:43,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:43,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:43,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:43,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:43,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:35:43,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:43,747 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-28 14:35:44,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:44,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:44,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:44,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:44,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:44,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:35:44,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:44,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:44,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:44,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:44,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077317176] [2020-10-28 14:35:44,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:44,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:44,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384735640] [2020-10-28 14:35:44,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:44,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:44,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:44,220 INFO L87 Difference]: Start difference. First operand 302 states and 341 transitions. Second operand 17 states. [2020-10-28 14:35:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:45,816 INFO L93 Difference]: Finished difference Result 448 states and 510 transitions. [2020-10-28 14:35:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:35:45,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-28 14:35:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:45,820 INFO L225 Difference]: With dead ends: 448 [2020-10-28 14:35:45,820 INFO L226 Difference]: Without dead ends: 430 [2020-10-28 14:35:45,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:35:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-10-28 14:35:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 320. [2020-10-28 14:35:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-28 14:35:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 363 transitions. [2020-10-28 14:35:45,885 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 363 transitions. Word has length 44 [2020-10-28 14:35:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:45,885 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 363 transitions. [2020-10-28 14:35:45,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:35:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 363 transitions. [2020-10-28 14:35:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:45,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:45,886 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:45,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-28 14:35:45,887 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1926734834, now seen corresponding path program 11 times [2020-10-28 14:35:45,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:45,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153032517] [2020-10-28 14:35:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:45,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:46,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:48,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2336 [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:35:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:48,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:48,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:48,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:48,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:48,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:48,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:35:48,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:48,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:48,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:35:48,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153032517] [2020-10-28 14:35:48,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:48,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:35:48,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675545316] [2020-10-28 14:35:48,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:35:48,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:35:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:35:48,638 INFO L87 Difference]: Start difference. First operand 320 states and 363 transitions. Second operand 14 states. [2020-10-28 14:35:49,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:35:49,858 INFO L93 Difference]: Finished difference Result 353 states and 400 transitions. [2020-10-28 14:35:49,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:35:49,859 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-28 14:35:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:35:49,861 INFO L225 Difference]: With dead ends: 353 [2020-10-28 14:35:49,861 INFO L226 Difference]: Without dead ends: 295 [2020-10-28 14:35:49,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:35:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-28 14:35:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-10-28 14:35:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-28 14:35:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 335 transitions. [2020-10-28 14:35:49,962 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 335 transitions. Word has length 44 [2020-10-28 14:35:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:35:49,962 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 335 transitions. [2020-10-28 14:35:49,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:35:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 335 transitions. [2020-10-28 14:35:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:35:49,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:35:49,963 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:35:49,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-28 14:35:49,963 INFO L429 AbstractCegarLoop]: === Iteration 83 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:35:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:35:49,963 INFO L82 PathProgramCache]: Analyzing trace with hash 66812728, now seen corresponding path program 23 times [2020-10-28 14:35:49,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:35:49,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687547913] [2020-10-28 14:35:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:35:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:50,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:50,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:50,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:51,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:51,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:35:51,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:35:51,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1958 [2020-10-28 14:35:51,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:51,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:35:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:35:51,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:35:51,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:52,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:35:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:35:52,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:35:52,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:35:52,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:35:52,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:35:52,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:35:52,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:35:52,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:35:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:35:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:35:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:35:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:35:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:35:52,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687547913] [2020-10-28 14:35:52,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:35:52,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:35:52,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289838930] [2020-10-28 14:35:52,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:35:52,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:35:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:35:52,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:35:52,859 INFO L87 Difference]: Start difference. First operand 295 states and 335 transitions. Second operand 17 states.