/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:10:09,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:10:09,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:10:09,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:10:09,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:10:09,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:10:09,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:10:09,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:10:09,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:10:09,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:10:09,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:10:09,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:10:09,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:10:09,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:10:09,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:10:09,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:10:09,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:10:09,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:10:09,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:10:09,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:10:09,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:10:09,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:10:09,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:10:09,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:10:09,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:10:09,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:10:09,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:10:09,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:10:09,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:10:09,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:10:09,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:10:09,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:10:09,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:10:09,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:10:09,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:10:09,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:10:09,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:10:09,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:10:09,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:10:09,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:10:09,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:10:09,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:10:09,776 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:10:09,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:10:09,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:10:09,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:10:09,781 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:10:09,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:10:09,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:10:09,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:10:09,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:10:09,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:10:09,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:10:09,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:10:09,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:10:09,783 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:10:09,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:10:09,784 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:10:09,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:10:09,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:10:09,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:10:09,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:10:09,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:10:09,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:09,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:10:09,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:10:09,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:10:09,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:10:09,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:10:09,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:10:09,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:10:09,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:10:10,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:10:10,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:10:10,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:10:10,183 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:10:10,184 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:10:10,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i [2020-10-29 09:10:10,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8de437b1/31cf0a780df6437cb1e061a890d02f31/FLAG08841d5d4 [2020-10-29 09:10:11,008 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:10:11,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i [2020-10-29 09:10:11,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8de437b1/31cf0a780df6437cb1e061a890d02f31/FLAG08841d5d4 [2020-10-29 09:10:11,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8de437b1/31cf0a780df6437cb1e061a890d02f31 [2020-10-29 09:10:11,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:10:11,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:10:11,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:11,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:10:11,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:10:11,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf2aaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11, skipping insertion in model container [2020-10-29 09:10:11,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:10:11,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:10:11,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:11,759 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:10:11,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:11,864 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:10:11,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11 WrapperNode [2020-10-29 09:10:11,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:11,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:10:11,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:10:11,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:10:11,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (1/1) ... [2020-10-29 09:10:11,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:10:11,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:10:11,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:10:11,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:10:11,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:12,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:10:12,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:10:12,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:10:12,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:10:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:10:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:10:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:10:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:10:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:10:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:10:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:10:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:10:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:10:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:10:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:10:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:10:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:10:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:10:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:10:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:10:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:10:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:10:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:10:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:10:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:10:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:10:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:10:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:10:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:10:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:10:12,073 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:10:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:10:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:10:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:10:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:10:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:10:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:10:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:10:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:10:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:10:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:10:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:10:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:10:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:10:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:10:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:10:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:10:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:10:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:10:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:10:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:10:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:10:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:10:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:10:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:10:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:10:12,082 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:10:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:10:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:10:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:10:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:10:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:10:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:10:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:10:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:10:12,086 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:10:12,087 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:10:12,087 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:10:12,087 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:10:12,087 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:10:12,088 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:10:12,088 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:10:12,088 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:10:12,088 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:10:12,088 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:10:12,089 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:10:12,089 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:10:12,089 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:10:12,089 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:10:12,089 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:10:12,090 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:10:12,090 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:10:12,090 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:10:12,090 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:10:12,090 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:10:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:10:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:10:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:10:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:10:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:10:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:10:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:10:12,092 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:10:12,092 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:10:12,092 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:10:12,092 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:10:12,092 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:10:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:10:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:10:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:10:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:10:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:10:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:10:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:10:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:10:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:10:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:10:12,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:10:12,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:10:12,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:10:12,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:10:12,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:10:12,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:10:12,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:10:12,894 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:10:12,895 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-29 09:10:12,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:12 BoogieIcfgContainer [2020-10-29 09:10:12,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:10:12,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:10:12,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:10:12,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:10:12,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:10:11" (1/3) ... [2020-10-29 09:10:12,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbbacec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:12, skipping insertion in model container [2020-10-29 09:10:12,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:11" (2/3) ... [2020-10-29 09:10:12,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbbacec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:12, skipping insertion in model container [2020-10-29 09:10:12,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:12" (3/3) ... [2020-10-29 09:10:12,906 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2020-10-29 09:10:12,918 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:10:12,923 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:10:12,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:10:12,963 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:10:12,963 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:10:12,963 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:10:12,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:10:12,963 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:10:12,963 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:10:12,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:10:12,964 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:10:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-29 09:10:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:10:12,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:12,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:12,988 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1655213968, now seen corresponding path program 1 times [2020-10-29 09:10:13,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:13,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603473299] [2020-10-29 09:10:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:13,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:13,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:13,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:10:13,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:13,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-29 09:10:13,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:13,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:10:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:10:14,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:14,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:14,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:14,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:14,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:14,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:14,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:14,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:14,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603473299] [2020-10-29 09:10:14,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:14,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:10:14,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127374930] [2020-10-29 09:10:14,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:14,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:14,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:14,087 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 8 states. [2020-10-29 09:10:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:14,588 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2020-10-29 09:10:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:14,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-29 09:10:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:14,600 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:10:14,601 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:10:14,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:10:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2020-10-29 09:10:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:10:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-10-29 09:10:14,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2020-10-29 09:10:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:14,655 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-10-29 09:10:14,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-10-29 09:10:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:10:14,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:14,657 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:14,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:10:14,657 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:14,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1907723868, now seen corresponding path program 1 times [2020-10-29 09:10:14,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:14,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920617695] [2020-10-29 09:10:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:14,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:14,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:15,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:15,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:10:15,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:15,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-10-29 09:10:15,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:15,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:15,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:15,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:15,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:10:15,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:15,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:15,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:15,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:15,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:15,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:15,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:15,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:15,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:15,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:15,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:15,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920617695] [2020-10-29 09:10:15,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:15,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934411118] [2020-10-29 09:10:15,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:15,492 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 8 states. [2020-10-29 09:10:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:16,070 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-10-29 09:10:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:16,071 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-29 09:10:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:16,073 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:10:16,073 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:10:16,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:10:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2020-10-29 09:10:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:10:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-29 09:10:16,083 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2020-10-29 09:10:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:16,084 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-29 09:10:16,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:16,084 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-29 09:10:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:10:16,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:16,085 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:16,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:10:16,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1515612570, now seen corresponding path program 1 times [2020-10-29 09:10:16,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:16,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087971689] [2020-10-29 09:10:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:16,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:16,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:10:16,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:16,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-29 09:10:16,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:16,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:10:16,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:16,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:16,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:16,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:16,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:16,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:10:16,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:16,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:16,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:16,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:16,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087971689] [2020-10-29 09:10:16,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:16,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:16,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406728558] [2020-10-29 09:10:16,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:16,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:16,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:16,608 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 9 states. [2020-10-29 09:10:17,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:17,259 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2020-10-29 09:10:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:17,259 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-29 09:10:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:17,261 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:10:17,261 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:10:17,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:10:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:10:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2020-10-29 09:10:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:10:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-29 09:10:17,281 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 21 [2020-10-29 09:10:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:17,281 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-29 09:10:17,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-29 09:10:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:10:17,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:17,283 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:17,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:10:17,284 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1991786825, now seen corresponding path program 2 times [2020-10-29 09:10:17,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:17,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946830657] [2020-10-29 09:10:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:17,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:17,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:17,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:10:17,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:17,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-29 09:10:17,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:17,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:17,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:17,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:10:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:10:17,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:17,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:17,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:17,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:17,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:17,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:17,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:17,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:17,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:17,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:17,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:17,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:10:17,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946830657] [2020-10-29 09:10:17,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:17,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:17,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349758192] [2020-10-29 09:10:17,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:17,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:17,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:17,530 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 6 states. [2020-10-29 09:10:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:17,728 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-29 09:10:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:17,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:10:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:17,730 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:10:17,730 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:10:17,733 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 [2020-10-29 09:10:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:10:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-29 09:10:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:10:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-29 09:10:17,747 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2020-10-29 09:10:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:17,748 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-29 09:10:17,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-29 09:10:17,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:10:17,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:17,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:17,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:10:17,753 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:17,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:17,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1270005385, now seen corresponding path program 1 times [2020-10-29 09:10:17,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:17,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148576444] [2020-10-29 09:10:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:17,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:17,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:18,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:10:18,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:18,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-29 09:10:18,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:18,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:10:18,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:18,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:18,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:18,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:18,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:18,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:10:18,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:18,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:18,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:18,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148576444] [2020-10-29 09:10:18,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:18,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:18,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568364498] [2020-10-29 09:10:18,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:18,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:18,239 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2020-10-29 09:10:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:18,481 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-29 09:10:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:18,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:10:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:18,483 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:10:18,483 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:10:18,484 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 [2020-10-29 09:10:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:10:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-29 09:10:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:10:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-29 09:10:18,496 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 23 [2020-10-29 09:10:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:18,496 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-29 09:10:18,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-29 09:10:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:10:18,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:18,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:18,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:10:18,498 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:18,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1663032395, now seen corresponding path program 1 times [2020-10-29 09:10:18,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:18,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926351150] [2020-10-29 09:10:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:10:19,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:19,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-29 09:10:19,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:19,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:10:19,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:10:19,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:19,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:19,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:19,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:19,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:19,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:19,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:19,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926351150] [2020-10-29 09:10:19,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:19,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 09:10:19,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069611128] [2020-10-29 09:10:19,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:19,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:19,492 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 8 states. [2020-10-29 09:10:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:20,039 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-29 09:10:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:20,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 09:10:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:20,040 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:10:20,041 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:10:20,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:10:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:10:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2020-10-29 09:10:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:10:20,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-29 09:10:20,057 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 23 [2020-10-29 09:10:20,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:20,057 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-29 09:10:20,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-29 09:10:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:10:20,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:20,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:20,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:10:20,063 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2042394987, now seen corresponding path program 1 times [2020-10-29 09:10:20,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:20,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374321730] [2020-10-29 09:10:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:10:20,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:20,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-29 09:10:20,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:20,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:20,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:10:20,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:20,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:20,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:20,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:20,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:10:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374321730] [2020-10-29 09:10:20,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:20,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:20,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834529285] [2020-10-29 09:10:20,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:20,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:20,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:20,613 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 10 states. [2020-10-29 09:10:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:21,269 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-10-29 09:10:21,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:21,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-29 09:10:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:21,271 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:10:21,271 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:10:21,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:10:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:10:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-10-29 09:10:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:10:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-10-29 09:10:21,280 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 24 [2020-10-29 09:10:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:21,280 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-10-29 09:10:21,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-10-29 09:10:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:10:21,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:21,281 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:21,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:10:21,282 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:21,282 INFO L82 PathProgramCache]: Analyzing trace with hash 917091098, now seen corresponding path program 1 times [2020-10-29 09:10:21,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:21,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243088141] [2020-10-29 09:10:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:10:21,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-29 09:10:21,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:21,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:10:21,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:10:21,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:21,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:21,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:21,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:21,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:21,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243088141] [2020-10-29 09:10:21,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:21,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:10:21,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478250704] [2020-10-29 09:10:21,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:21,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:21,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:21,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:21,469 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2020-10-29 09:10:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:21,698 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-29 09:10:21,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:21,698 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-29 09:10:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:21,699 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:10:21,699 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 09:10:21,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 09:10:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-10-29 09:10:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:10:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-29 09:10:21,707 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 25 [2020-10-29 09:10:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:21,708 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-29 09:10:21,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-29 09:10:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:10:21,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:21,709 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:21,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:10:21,709 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:21,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:21,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1387738926, now seen corresponding path program 1 times [2020-10-29 09:10:21,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:21,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746691263] [2020-10-29 09:10:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:22,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:10:22,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:22,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1246 [2020-10-29 09:10:22,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:22,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:22,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:22,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:22,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:10:22,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:23,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:23,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:23,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:23,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:23,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:23,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:23,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:23,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:23,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:23,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:23,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746691263] [2020-10-29 09:10:23,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:23,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:23,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594985701] [2020-10-29 09:10:23,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:23,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:23,221 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 11 states. [2020-10-29 09:10:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:23,728 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2020-10-29 09:10:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:23,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-29 09:10:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:23,729 INFO L225 Difference]: With dead ends: 85 [2020-10-29 09:10:23,729 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:10:23,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:10:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:10:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-10-29 09:10:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:10:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-10-29 09:10:23,751 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 25 [2020-10-29 09:10:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:23,751 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-10-29 09:10:23,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-10-29 09:10:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:10:23,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:23,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:23,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:10:23,755 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash -874384875, now seen corresponding path program 1 times [2020-10-29 09:10:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:23,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887775466] [2020-10-29 09:10:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:24,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:10:24,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:24,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-29 09:10:24,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:24,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:24,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:24,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:24,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:10:24,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:24,919 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-29 09:10:24,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:24,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:25,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:25,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:25,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:25,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:25,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:25,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:25,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:25,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:25,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:25,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887775466] [2020-10-29 09:10:25,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:25,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:25,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345038687] [2020-10-29 09:10:25,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:25,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:25,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:25,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:25,013 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 10 states. [2020-10-29 09:10:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:25,414 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2020-10-29 09:10:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:25,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:10:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:25,416 INFO L225 Difference]: With dead ends: 91 [2020-10-29 09:10:25,416 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:10:25,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:10:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2020-10-29 09:10:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:10:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-29 09:10:25,426 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 26 [2020-10-29 09:10:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:25,426 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-29 09:10:25,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-29 09:10:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:25,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:25,428 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:25,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:10:25,428 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:25,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880250, now seen corresponding path program 2 times [2020-10-29 09:10:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:25,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159737187] [2020-10-29 09:10:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:25,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:25,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:25,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:25,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-29 09:10:25,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:25,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:10:25,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:25,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:25,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:25,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:25,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:25,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:25,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:25,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159737187] [2020-10-29 09:10:25,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:25,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:25,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957893650] [2020-10-29 09:10:25,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:25,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:25,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:25,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:25,878 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 10 states. [2020-10-29 09:10:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:26,755 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2020-10-29 09:10:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:10:26,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 09:10:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:26,757 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:10:26,757 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:10:26,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:10:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:10:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-10-29 09:10:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:10:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-29 09:10:26,766 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 27 [2020-10-29 09:10:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:26,766 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-29 09:10:26,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-10-29 09:10:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:26,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:26,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:26,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:10:26,768 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:26,769 INFO L82 PathProgramCache]: Analyzing trace with hash -813857545, now seen corresponding path program 1 times [2020-10-29 09:10:26,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:26,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708383401] [2020-10-29 09:10:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:26,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:28,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:28,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:10:28,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2144 [2020-10-29 09:10:28,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:28,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:29,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:29,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:29,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:29,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:29,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:29,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:29,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:29,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708383401] [2020-10-29 09:10:29,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:29,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:29,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871398209] [2020-10-29 09:10:29,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:29,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:29,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:29,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:29,160 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 10 states. [2020-10-29 09:10:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:29,704 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-10-29 09:10:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:29,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-29 09:10:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:29,706 INFO L225 Difference]: With dead ends: 94 [2020-10-29 09:10:29,706 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:10:29,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:10:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:10:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2020-10-29 09:10:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:10:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-29 09:10:29,723 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 27 [2020-10-29 09:10:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:29,724 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-29 09:10:29,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-29 09:10:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:29,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:29,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:29,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:10:29,725 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1434445165, now seen corresponding path program 2 times [2020-10-29 09:10:29,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:29,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487285808] [2020-10-29 09:10:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:29,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:31,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1662 [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:31,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:31,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:31,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:31,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:31,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:31,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:31,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:31,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:31,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:31,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:31,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:31,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:31,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487285808] [2020-10-29 09:10:31,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:31,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:10:31,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546873638] [2020-10-29 09:10:31,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:10:31,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:31,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:10:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:31,715 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 12 states. [2020-10-29 09:10:32,887 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-29 09:10:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:33,254 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2020-10-29 09:10:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:10:33,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-29 09:10:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:33,256 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:10:33,256 INFO L226 Difference]: Without dead ends: 112 [2020-10-29 09:10:33,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:10:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-29 09:10:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 75. [2020-10-29 09:10:33,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:10:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-29 09:10:33,265 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 27 [2020-10-29 09:10:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:33,266 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-29 09:10:33,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:10:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-29 09:10:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:10:33,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:33,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:33,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:10:33,267 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:33,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1401853574, now seen corresponding path program 1 times [2020-10-29 09:10:33,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:33,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185443927] [2020-10-29 09:10:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:10:33,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:33,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-29 09:10:33,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:33,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:33,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:10:33,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:33,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:33,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:33,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:33,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:10:33,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185443927] [2020-10-29 09:10:33,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:33,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:33,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609208334] [2020-10-29 09:10:33,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:33,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:33,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:33,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:33,651 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 6 states. [2020-10-29 09:10:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:33,844 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-29 09:10:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:33,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-29 09:10:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:33,846 INFO L225 Difference]: With dead ends: 91 [2020-10-29 09:10:33,846 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:10:33,846 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 [2020-10-29 09:10:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:10:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 09:10:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:10:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-10-29 09:10:33,854 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2020-10-29 09:10:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:33,854 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-10-29 09:10:33,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-10-29 09:10:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:10:33,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:33,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:33,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:10:33,856 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:33,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:33,856 INFO L82 PathProgramCache]: Analyzing trace with hash 349384499, now seen corresponding path program 1 times [2020-10-29 09:10:33,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:33,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130854126] [2020-10-29 09:10:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:34,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:10:34,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:34,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-29 09:10:34,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:34,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:34,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:35,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:35,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:35,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:35,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130854126] [2020-10-29 09:10:35,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:35,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:35,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962145960] [2020-10-29 09:10:35,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:35,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:35,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:35,106 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 11 states. [2020-10-29 09:10:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:36,011 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2020-10-29 09:10:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:36,012 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-29 09:10:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:36,013 INFO L225 Difference]: With dead ends: 118 [2020-10-29 09:10:36,013 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 09:10:36,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 09:10:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-29 09:10:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:10:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2020-10-29 09:10:36,030 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 28 [2020-10-29 09:10:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:36,031 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2020-10-29 09:10:36,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2020-10-29 09:10:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:10:36,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:36,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:36,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:10:36,033 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash 713976026, now seen corresponding path program 1 times [2020-10-29 09:10:36,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:36,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465024624] [2020-10-29 09:10:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:10:36,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:36,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-29 09:10:36,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:36,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:36,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:36,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:36,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:36,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:36,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:36,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:36,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:36,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:36,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465024624] [2020-10-29 09:10:36,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:36,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:36,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583318172] [2020-10-29 09:10:36,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:36,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:36,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:36,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:36,700 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 8 states. [2020-10-29 09:10:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:37,135 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2020-10-29 09:10:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:37,135 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-29 09:10:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:37,136 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:10:37,137 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 09:10:37,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 09:10:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2020-10-29 09:10:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:10:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-10-29 09:10:37,146 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 28 [2020-10-29 09:10:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:37,146 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-10-29 09:10:37,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:37,146 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-10-29 09:10:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:10:37,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:37,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:37,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:10:37,147 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:37,148 INFO L82 PathProgramCache]: Analyzing trace with hash 320949016, now seen corresponding path program 1 times [2020-10-29 09:10:37,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:37,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388875464] [2020-10-29 09:10:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:37,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:37,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:10:37,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:37,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-29 09:10:37,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:37,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:37,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:37,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:37,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:10:37,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:38,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:38,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:38,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:38,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:38,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:38,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:38,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:38,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:38,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:38,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388875464] [2020-10-29 09:10:38,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:38,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:38,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755718940] [2020-10-29 09:10:38,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:38,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:38,158 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 10 states. [2020-10-29 09:10:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:38,831 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2020-10-29 09:10:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:38,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 09:10:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:38,833 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:10:38,833 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:10:38,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:10:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:10:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2020-10-29 09:10:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:10:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-10-29 09:10:38,842 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 28 [2020-10-29 09:10:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:38,843 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-10-29 09:10:38,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-10-29 09:10:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:10:38,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:38,844 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:38,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:10:38,844 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash -693539371, now seen corresponding path program 3 times [2020-10-29 09:10:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:38,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045618129] [2020-10-29 09:10:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:38,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:39,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:10:39,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:39,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-29 09:10:39,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:39,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:39,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:10:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:39,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:39,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:39,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:39,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:39,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:39,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:39,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:39,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:39,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045618129] [2020-10-29 09:10:39,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:39,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:10:39,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032329579] [2020-10-29 09:10:39,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:10:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:10:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:39,511 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 12 states. [2020-10-29 09:10:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:40,576 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2020-10-29 09:10:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:10:40,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-29 09:10:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:40,578 INFO L225 Difference]: With dead ends: 118 [2020-10-29 09:10:40,578 INFO L226 Difference]: Without dead ends: 114 [2020-10-29 09:10:40,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:10:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-29 09:10:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2020-10-29 09:10:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-10-29 09:10:40,589 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 29 [2020-10-29 09:10:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:40,590 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-10-29 09:10:40,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:10:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-10-29 09:10:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:10:40,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:40,591 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:40,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:10:40,591 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:40,591 INFO L82 PathProgramCache]: Analyzing trace with hash -865974456, now seen corresponding path program 3 times [2020-10-29 09:10:40,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:40,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767430710] [2020-10-29 09:10:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:40,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:42,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:10:42,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:42,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2220 [2020-10-29 09:10:42,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:42,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:42,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:10:42,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:42,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:10:42,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:43,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:43,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:43,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:43,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:43,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:43,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:43,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:43,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:43,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767430710] [2020-10-29 09:10:43,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:43,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:10:43,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891802769] [2020-10-29 09:10:43,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:10:43,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:43,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:10:43,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:43,207 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 13 states. [2020-10-29 09:10:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:43,885 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2020-10-29 09:10:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:43,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-29 09:10:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:43,887 INFO L225 Difference]: With dead ends: 114 [2020-10-29 09:10:43,887 INFO L226 Difference]: Without dead ends: 110 [2020-10-29 09:10:43,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:10:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-29 09:10:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2020-10-29 09:10:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:10:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2020-10-29 09:10:43,898 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 29 [2020-10-29 09:10:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:43,898 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2020-10-29 09:10:43,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:10:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2020-10-29 09:10:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:43,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:43,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:43,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:10:43,899 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:43,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:43,900 INFO L82 PathProgramCache]: Analyzing trace with hash 557747645, now seen corresponding path program 1 times [2020-10-29 09:10:43,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:43,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210857226] [2020-10-29 09:10:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:43,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:44,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:44,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:44,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:44,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-29 09:10:44,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:44,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:44,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:44,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:10:44,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:44,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:44,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:44,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:44,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:44,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:44,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:44,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:44,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:44,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:44,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210857226] [2020-10-29 09:10:44,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:44,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:44,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088190516] [2020-10-29 09:10:44,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:44,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:44,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:44,345 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand 11 states. [2020-10-29 09:10:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:44,963 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2020-10-29 09:10:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:44,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:10:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:44,967 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:10:44,967 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 09:10:44,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 09:10:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2020-10-29 09:10:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-29 09:10:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-29 09:10:44,981 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 30 [2020-10-29 09:10:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:44,981 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-29 09:10:44,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-29 09:10:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:44,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:44,982 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:44,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:10:44,983 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:44,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2050820280, now seen corresponding path program 2 times [2020-10-29 09:10:44,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:44,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785746837] [2020-10-29 09:10:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:45,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:45,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:46,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:46,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:46,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-29 09:10:46,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:46,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:46,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:10:46,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:46,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:10:46,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:46,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:46,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:46,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785746837] [2020-10-29 09:10:46,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:46,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:10:46,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765005504] [2020-10-29 09:10:46,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:10:46,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:46,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:10:46,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:46,841 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 13 states. [2020-10-29 09:10:47,373 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-29 09:10:47,901 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-29 09:10:48,194 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-10-29 09:10:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:48,761 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2020-10-29 09:10:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:10:48,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-29 09:10:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:48,762 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:10:48,763 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:10:48,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:10:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:10:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2020-10-29 09:10:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-10-29 09:10:48,774 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 30 [2020-10-29 09:10:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:48,775 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-10-29 09:10:48,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:10:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-10-29 09:10:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:48,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:48,776 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:48,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:10:48,776 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:48,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1879555489, now seen corresponding path program 2 times [2020-10-29 09:10:48,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:48,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512900103] [2020-10-29 09:10:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:48,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:48,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:50,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:50,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:50,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1389 [2020-10-29 09:10:50,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:50,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:50,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:50,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:50,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:50,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:50,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:50,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:50,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:50,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:50,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512900103] [2020-10-29 09:10:50,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:50,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:50,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790481784] [2020-10-29 09:10:50,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:50,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:50,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:50,307 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 9 states. [2020-10-29 09:10:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:50,800 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2020-10-29 09:10:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:50,803 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-29 09:10:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:50,804 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:10:50,804 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:10:50,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:10:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-10-29 09:10:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2020-10-29 09:10:50,814 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 30 [2020-10-29 09:10:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:50,815 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2020-10-29 09:10:50,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2020-10-29 09:10:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:50,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:50,815 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:50,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:10:50,816 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash 870869970, now seen corresponding path program 3 times [2020-10-29 09:10:50,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:50,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145258710] [2020-10-29 09:10:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:50,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:50,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:52,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:52,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:52,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-10-29 09:10:52,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:52,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:52,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:10:52,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:52,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:10:52,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:53,231 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-10-29 09:10:53,391 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-29 09:10:53,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:53,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:53,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:53,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:53,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:53,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:53,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:53,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:53,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:53,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145258710] [2020-10-29 09:10:53,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:53,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:10:53,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327869664] [2020-10-29 09:10:53,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:10:53,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:53,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:10:53,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:53,729 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand 15 states. [2020-10-29 09:10:55,236 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-10-29 09:10:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:55,733 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2020-10-29 09:10:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:10:55,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-29 09:10:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:55,735 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:10:55,735 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:10:55,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:10:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:10:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2020-10-29 09:10:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:10:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-29 09:10:55,745 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 31 [2020-10-29 09:10:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:55,746 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-29 09:10:55,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:10:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-29 09:10:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:55,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:55,747 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:55,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:10:55,747 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:55,747 INFO L82 PathProgramCache]: Analyzing trace with hash 606182002, now seen corresponding path program 1 times [2020-10-29 09:10:55,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:55,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016125703] [2020-10-29 09:10:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:55,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:56,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:56,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:56,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:56,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-29 09:10:56,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:56,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:56,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:56,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:56,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:10:56,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:56,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:56,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:56,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:56,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:56,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:56,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:56,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:56,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:56,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:56,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:56,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016125703] [2020-10-29 09:10:56,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:56,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:10:56,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066517949] [2020-10-29 09:10:56,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:10:56,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:56,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:10:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:56,612 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 12 states. [2020-10-29 09:10:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:57,422 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2020-10-29 09:10:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:10:57,423 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-29 09:10:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:57,424 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:10:57,424 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:10:57,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:10:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:10:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-29 09:10:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:10:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-10-29 09:10:57,436 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 31 [2020-10-29 09:10:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:57,436 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-10-29 09:10:57,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:10:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-10-29 09:10:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:57,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:57,437 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:57,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:10:57,437 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash 511362288, now seen corresponding path program 4 times [2020-10-29 09:10:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:57,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352989795] [2020-10-29 09:10:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:57,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:57,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:10:57,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:58,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:58,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:58,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:58,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:58,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:58,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:58,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:58,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352989795] [2020-10-29 09:10:58,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:58,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:10:58,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703835493] [2020-10-29 09:10:58,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:10:58,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:10:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:58,245 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 13 states. [2020-10-29 09:10:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:59,886 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2020-10-29 09:10:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:10:59,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-29 09:10:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:59,889 INFO L225 Difference]: With dead ends: 151 [2020-10-29 09:10:59,889 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 09:10:59,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:10:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 09:10:59,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 97. [2020-10-29 09:10:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:10:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2020-10-29 09:10:59,901 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 31 [2020-10-29 09:10:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:59,901 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2020-10-29 09:10:59,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:10:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2020-10-29 09:10:59,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:10:59,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:59,902 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:59,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:10:59,903 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:59,903 INFO L82 PathProgramCache]: Analyzing trace with hash 487963426, now seen corresponding path program 2 times [2020-10-29 09:10:59,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:59,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209922526] [2020-10-29 09:10:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:59,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:11:00,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:00,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:00,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:00,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:00,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:00,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:00,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:00,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:00,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:00,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:00,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:00,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:00,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:00,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209922526] [2020-10-29 09:11:00,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:00,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:00,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689664564] [2020-10-29 09:11:00,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:00,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:00,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:00,224 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand 11 states. [2020-10-29 09:11:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:00,710 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2020-10-29 09:11:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:00,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 09:11:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:00,712 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:11:00,712 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:11:00,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:11:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:11:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2020-10-29 09:11:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:11:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2020-10-29 09:11:00,724 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 32 [2020-10-29 09:11:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:00,724 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2020-10-29 09:11:00,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2020-10-29 09:11:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:11:00,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:00,725 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:00,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:11:00,726 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:00,726 INFO L82 PathProgramCache]: Analyzing trace with hash 980797264, now seen corresponding path program 5 times [2020-10-29 09:11:00,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:00,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334804710] [2020-10-29 09:11:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:00,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:01,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:01,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:11:01,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:01,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-29 09:11:01,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:01,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:11:01,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:01,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:01,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:01,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:01,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:01,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:01,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:01,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:01,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:01,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:01,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334804710] [2020-10-29 09:11:01,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:01,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:01,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553749339] [2020-10-29 09:11:01,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:01,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:01,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:01,380 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 12 states. [2020-10-29 09:11:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:02,696 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2020-10-29 09:11:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:11:02,696 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:11:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:02,697 INFO L225 Difference]: With dead ends: 136 [2020-10-29 09:11:02,698 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:11:02,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:11:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:11:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2020-10-29 09:11:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:11:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-10-29 09:11:02,711 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 32 [2020-10-29 09:11:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:02,712 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-10-29 09:11:02,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-10-29 09:11:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:11:02,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:02,712 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:02,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:11:02,713 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash 748066045, now seen corresponding path program 3 times [2020-10-29 09:11:02,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:02,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297869227] [2020-10-29 09:11:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:02,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:03,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:04,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:11:04,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:04,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1796 [2020-10-29 09:11:04,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:04,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:04,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:04,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:04,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:11:04,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:04,944 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-29 09:11:05,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:05,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:05,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:05,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:05,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:05,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:05,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:05,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:05,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:05,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297869227] [2020-10-29 09:11:05,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:05,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:05,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019022091] [2020-10-29 09:11:05,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:05,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:05,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:05,096 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 14 states. [2020-10-29 09:11:06,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:06,278 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2020-10-29 09:11:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:11:06,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-29 09:11:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:06,281 INFO L225 Difference]: With dead ends: 139 [2020-10-29 09:11:06,281 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 09:11:06,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:11:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 09:11:06,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2020-10-29 09:11:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 09:11:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-10-29 09:11:06,295 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 32 [2020-10-29 09:11:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:06,295 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-10-29 09:11:06,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-10-29 09:11:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:11:06,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:06,296 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:06,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:11:06,296 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:06,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1112657572, now seen corresponding path program 4 times [2020-10-29 09:11:06,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:06,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885610033] [2020-10-29 09:11:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:06,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:06,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:06,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:09,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:11:09,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2840 [2020-10-29 09:11:09,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:09,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:11:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:11:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:09,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:09,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:09,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:09,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:09,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:09,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:09,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:09,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:09,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:09,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:09,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:09,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885610033] [2020-10-29 09:11:09,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:09,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:09,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413544702] [2020-10-29 09:11:09,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:09,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:09,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:09,375 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 10 states. [2020-10-29 09:11:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:10,172 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2020-10-29 09:11:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:10,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-29 09:11:10,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:10,173 INFO L225 Difference]: With dead ends: 123 [2020-10-29 09:11:10,174 INFO L226 Difference]: Without dead ends: 110 [2020-10-29 09:11:10,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-29 09:11:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-29 09:11:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 09:11:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2020-10-29 09:11:10,190 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 32 [2020-10-29 09:11:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:10,190 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2020-10-29 09:11:10,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2020-10-29 09:11:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:10,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:10,191 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:10,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:11:10,191 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash 750807031, now seen corresponding path program 1 times [2020-10-29 09:11:10,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:10,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560668406] [2020-10-29 09:11:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:10,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:10,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-29 09:11:10,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:11:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:10,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:11:10,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:11,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:11,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:11,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:11,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:11,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:11,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:11,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:11,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:11,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:11,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:11,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:11:11,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560668406] [2020-10-29 09:11:11,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:11,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:11,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651986967] [2020-10-29 09:11:11,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:11,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:11,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:11,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:11,092 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 8 states. [2020-10-29 09:11:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:11,556 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2020-10-29 09:11:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:11:11,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 09:11:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:11,558 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:11:11,558 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:11:11,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:11:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-29 09:11:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:11:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-10-29 09:11:11,569 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 33 [2020-10-29 09:11:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:11,570 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-10-29 09:11:11,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-10-29 09:11:11,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:11,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:11,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:11,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:11:11,571 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:11,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:11,571 INFO L82 PathProgramCache]: Analyzing trace with hash -798286451, now seen corresponding path program 4 times [2020-10-29 09:11:11,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:11,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823337212] [2020-10-29 09:11:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:11,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:12,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:12,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:12,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-10-29 09:11:12,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:12,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:12,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:12,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:12,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:11:12,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:13,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:13,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:13,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:13,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:13,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:13,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823337212] [2020-10-29 09:11:13,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:13,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:13,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872668902] [2020-10-29 09:11:13,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:13,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:13,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:13,366 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 13 states. [2020-10-29 09:11:14,510 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-10-29 09:11:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:14,966 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-29 09:11:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:11:14,967 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-29 09:11:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:14,968 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:11:14,968 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 09:11:14,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:11:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 09:11:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-29 09:11:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:11:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-10-29 09:11:14,982 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 33 [2020-10-29 09:11:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:14,982 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-10-29 09:11:14,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-10-29 09:11:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:14,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:14,983 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:14,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:11:14,983 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -211259753, now seen corresponding path program 1 times [2020-10-29 09:11:14,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:14,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009174898] [2020-10-29 09:11:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:15,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:15,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:15,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:15,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-29 09:11:15,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:15,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:15,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:15,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:15,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:11:15,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:16,226 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-29 09:11:16,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:16,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:16,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:16,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:16,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:16,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:16,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:16,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:16,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:16,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:16,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:16,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009174898] [2020-10-29 09:11:16,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:16,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:16,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498397617] [2020-10-29 09:11:16,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:16,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:16,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:16,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:16,478 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 14 states. [2020-10-29 09:11:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:17,611 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2020-10-29 09:11:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:17,611 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-29 09:11:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:17,612 INFO L225 Difference]: With dead ends: 113 [2020-10-29 09:11:17,612 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:11:17,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:11:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2020-10-29 09:11:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:11:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-10-29 09:11:17,626 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 33 [2020-10-29 09:11:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:17,626 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-10-29 09:11:17,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-10-29 09:11:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:17,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:17,627 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:17,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:11:17,627 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash -859805651, now seen corresponding path program 5 times [2020-10-29 09:11:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:17,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497536122] [2020-10-29 09:11:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:17,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:18,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:18,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:18,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:18,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-29 09:11:18,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:18,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:18,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:11:18,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:18,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:11:18,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:18,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:18,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:18,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:18,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:18,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:18,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:18,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:18,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497536122] [2020-10-29 09:11:18,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:18,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:18,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899004233] [2020-10-29 09:11:18,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:18,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:18,508 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 10 states. [2020-10-29 09:11:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:19,415 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2020-10-29 09:11:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:19,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-29 09:11:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:19,416 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:11:19,416 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 09:11:19,417 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 [2020-10-29 09:11:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 09:11:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2020-10-29 09:11:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 09:11:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2020-10-29 09:11:19,430 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 33 [2020-10-29 09:11:19,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:19,430 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-10-29 09:11:19,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2020-10-29 09:11:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:19,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:19,431 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:19,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:11:19,431 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1252832661, now seen corresponding path program 2 times [2020-10-29 09:11:19,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:19,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375172729] [2020-10-29 09:11:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:19,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:19,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:19,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:20,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:20,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:20,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-29 09:11:20,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:20,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:11:20,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:21,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:21,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:21,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375172729] [2020-10-29 09:11:21,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:21,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:21,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589063828] [2020-10-29 09:11:21,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:21,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:21,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:21,130 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 12 states. [2020-10-29 09:11:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:21,935 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-10-29 09:11:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:11:21,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-29 09:11:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:21,936 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:11:21,936 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 09:11:21,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 09:11:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-10-29 09:11:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:11:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-10-29 09:11:21,951 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 33 [2020-10-29 09:11:21,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:21,951 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-10-29 09:11:21,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-10-29 09:11:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:21,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:21,952 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:21,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:11:21,952 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1124493619, now seen corresponding path program 2 times [2020-10-29 09:11:21,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:21,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197947347] [2020-10-29 09:11:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:11:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:23,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:23,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:23,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:23,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:23,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:23,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:23,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:23,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:23,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:23,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197947347] [2020-10-29 09:11:23,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:23,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:23,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556937015] [2020-10-29 09:11:23,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:23,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:23,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:23,418 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 13 states. [2020-10-29 09:11:23,872 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-29 09:11:24,199 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-29 09:11:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:25,055 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-10-29 09:11:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:11:25,056 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-29 09:11:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:25,057 INFO L225 Difference]: With dead ends: 132 [2020-10-29 09:11:25,057 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:11:25,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:11:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:11:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-10-29 09:11:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:11:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2020-10-29 09:11:25,073 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 33 [2020-10-29 09:11:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:25,073 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2020-10-29 09:11:25,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2020-10-29 09:11:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:25,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:25,074 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:25,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:11:25,074 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:25,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1517520629, now seen corresponding path program 1 times [2020-10-29 09:11:25,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:25,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439650539] [2020-10-29 09:11:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:25,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:25,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:28,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:28,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:28,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:11:28,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3362 [2020-10-29 09:11:28,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:28,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:28,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:11:28,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:28,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:11:28,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:28,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:28,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:28,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:28,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:28,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:28,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:28,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:28,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:28,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:28,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439650539] [2020-10-29 09:11:28,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:28,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:28,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41029776] [2020-10-29 09:11:28,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:28,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:28,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:28,606 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand 10 states. [2020-10-29 09:11:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:29,155 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2020-10-29 09:11:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:29,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-29 09:11:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:29,157 INFO L225 Difference]: With dead ends: 136 [2020-10-29 09:11:29,157 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:11:29,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:11:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2020-10-29 09:11:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:11:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2020-10-29 09:11:29,175 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 33 [2020-10-29 09:11:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:29,175 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2020-10-29 09:11:29,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2020-10-29 09:11:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:11:29,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:29,176 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:29,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:11:29,176 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1219313333, now seen corresponding path program 6 times [2020-10-29 09:11:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:29,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70888613] [2020-10-29 09:11:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:29,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:29,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:29,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:11:29,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:29,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-29 09:11:29,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:29,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:29,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:11:29,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:30,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:30,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:30,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:30,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:30,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:30,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:30,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:30,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:30,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:30,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:30,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:30,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:30,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70888613] [2020-10-29 09:11:30,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:30,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:30,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029368086] [2020-10-29 09:11:30,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:30,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:30,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:30,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:30,162 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 14 states. [2020-10-29 09:11:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:31,932 INFO L93 Difference]: Finished difference Result 141 states and 169 transitions. [2020-10-29 09:11:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:11:31,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-29 09:11:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:31,934 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:11:31,934 INFO L226 Difference]: Without dead ends: 137 [2020-10-29 09:11:31,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:11:31,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-29 09:11:31,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 99. [2020-10-29 09:11:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:11:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2020-10-29 09:11:31,955 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 33 [2020-10-29 09:11:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:31,955 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2020-10-29 09:11:31,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2020-10-29 09:11:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:11:31,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:31,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:31,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:11:31,956 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:31,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1130539435, now seen corresponding path program 7 times [2020-10-29 09:11:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:31,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495428023] [2020-10-29 09:11:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:32,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:32,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:11:32,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:32,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-29 09:11:32,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:32,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:32,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:32,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:32,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:32,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:32,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:32,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:32,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:32,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:32,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495428023] [2020-10-29 09:11:32,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:32,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:32,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267274100] [2020-10-29 09:11:32,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:32,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:32,958 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 14 states. [2020-10-29 09:11:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:34,481 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2020-10-29 09:11:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:11:34,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-29 09:11:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:34,483 INFO L225 Difference]: With dead ends: 135 [2020-10-29 09:11:34,484 INFO L226 Difference]: Without dead ends: 131 [2020-10-29 09:11:34,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:11:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-29 09:11:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 106. [2020-10-29 09:11:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 09:11:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2020-10-29 09:11:34,498 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 34 [2020-10-29 09:11:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:34,498 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2020-10-29 09:11:34,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2020-10-29 09:11:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:11:34,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:34,499 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:34,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:11:34,499 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1363270654, now seen corresponding path program 5 times [2020-10-29 09:11:34,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:34,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871786186] [2020-10-29 09:11:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:36,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2314 [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:36,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:37,360 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-29 09:11:37,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:37,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:37,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:37,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871786186] [2020-10-29 09:11:37,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:37,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:11:37,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393928134] [2020-10-29 09:11:37,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:11:37,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:37,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:11:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:37,567 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand 15 states. [2020-10-29 09:11:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:38,920 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2020-10-29 09:11:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:38,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-29 09:11:38,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:38,922 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:11:38,922 INFO L226 Difference]: Without dead ends: 126 [2020-10-29 09:11:38,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:11:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-29 09:11:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-29 09:11:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:11:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2020-10-29 09:11:38,938 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 34 [2020-10-29 09:11:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:38,938 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2020-10-29 09:11:38,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:11:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2020-10-29 09:11:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:38,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:38,939 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] [2020-10-29 09:11:38,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:11:38,940 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:38,940 INFO L82 PathProgramCache]: Analyzing trace with hash 206228860, now seen corresponding path program 2 times [2020-10-29 09:11:38,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:38,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669630527] [2020-10-29 09:11:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:38,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:39,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:39,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:41,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:41,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:41,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2047 [2020-10-29 09:11:41,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:41,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:41,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:11:41,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:41,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:41,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:41,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669630527] [2020-10-29 09:11:41,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:41,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804347792] [2020-10-29 09:11:41,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:41,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:41,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:41,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:41,360 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 13 states. [2020-10-29 09:11:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:42,399 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2020-10-29 09:11:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:11:42,399 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:11:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:42,400 INFO L225 Difference]: With dead ends: 123 [2020-10-29 09:11:42,401 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 09:11:42,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 09:11:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-10-29 09:11:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:11:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2020-10-29 09:11:42,417 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 35 [2020-10-29 09:11:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:42,418 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2020-10-29 09:11:42,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2020-10-29 09:11:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:42,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:42,418 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] [2020-10-29 09:11:42,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:11:42,419 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash -17955760, now seen corresponding path program 3 times [2020-10-29 09:11:42,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:42,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493432472] [2020-10-29 09:11:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:42,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:42,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:42,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:42,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-29 09:11:42,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:42,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:11:42,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:43,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:43,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:43,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:43,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:43,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:43,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:43,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:43,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:43,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:43,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493432472] [2020-10-29 09:11:43,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:43,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:43,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049875627] [2020-10-29 09:11:43,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:43,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:43,142 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 13 states. [2020-10-29 09:11:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:44,258 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2020-10-29 09:11:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:44,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:11:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:44,260 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:11:44,260 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:11:44,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:11:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2020-10-29 09:11:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:11:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2020-10-29 09:11:44,273 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 35 [2020-10-29 09:11:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:44,273 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2020-10-29 09:11:44,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2020-10-29 09:11:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:44,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:44,274 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:44,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:11:44,274 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:44,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1825214680, now seen corresponding path program 6 times [2020-10-29 09:11:44,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:44,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323691577] [2020-10-29 09:11:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:44,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:46,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:46,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:46,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1873 [2020-10-29 09:11:46,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:46,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:11:46,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:46,396 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-29 09:11:46,717 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-29 09:11:46,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:46,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:46,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:46,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:46,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:46,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:46,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:46,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:46,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:46,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:46,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:46,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323691577] [2020-10-29 09:11:46,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:46,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:11:46,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230736477] [2020-10-29 09:11:46,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:11:46,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:46,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:11:46,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:46,936 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 15 states. [2020-10-29 09:11:47,864 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-29 09:11:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:48,587 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2020-10-29 09:11:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:11:48,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-29 09:11:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:48,589 INFO L225 Difference]: With dead ends: 139 [2020-10-29 09:11:48,589 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 09:11:48,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:11:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 09:11:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-10-29 09:11:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 09:11:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2020-10-29 09:11:48,607 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 35 [2020-10-29 09:11:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:48,607 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2020-10-29 09:11:48,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:11:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2020-10-29 09:11:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:48,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:48,608 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:48,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:11:48,608 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1238187982, now seen corresponding path program 3 times [2020-10-29 09:11:48,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:48,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677655456] [2020-10-29 09:11:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:48,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:11:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:49,905 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-29 09:11:50,202 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-29 09:11:50,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:50,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:50,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:50,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:50,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:50,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:50,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:50,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677655456] [2020-10-29 09:11:50,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:50,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:11:50,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651112897] [2020-10-29 09:11:50,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:11:50,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:50,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:11:50,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:50,385 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand 15 states. [2020-10-29 09:11:51,105 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-29 09:11:51,355 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-29 09:11:51,767 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-29 09:11:52,019 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-10-29 09:11:52,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:52,479 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2020-10-29 09:11:52,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:11:52,479 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-29 09:11:52,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:52,481 INFO L225 Difference]: With dead ends: 143 [2020-10-29 09:11:52,481 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:11:52,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:11:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:11:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2020-10-29 09:11:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-29 09:11:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2020-10-29 09:11:52,502 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 35 [2020-10-29 09:11:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:52,502 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2020-10-29 09:11:52,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:11:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2020-10-29 09:11:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:52,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:52,503 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:52,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:11:52,503 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:52,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1886733880, now seen corresponding path program 6 times [2020-10-29 09:11:52,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:52,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238540016] [2020-10-29 09:11:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:52,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:53,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:57,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:57,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:57,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:11:57,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4871 [2020-10-29 09:11:57,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:57,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:57,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:57,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:57,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:11:57,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:57,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:57,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:57,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:57,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:57,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:57,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:57,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:57,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:57,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:57,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238540016] [2020-10-29 09:11:57,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:57,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:57,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317776975] [2020-10-29 09:11:57,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:57,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:57,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:57,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:57,607 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand 11 states. [2020-10-29 09:11:58,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:58,387 INFO L93 Difference]: Finished difference Result 137 states and 163 transitions. [2020-10-29 09:11:58,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:58,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-29 09:11:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:58,389 INFO L225 Difference]: With dead ends: 137 [2020-10-29 09:11:58,389 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:11:58,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:11:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2020-10-29 09:11:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 09:11:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2020-10-29 09:11:58,406 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 35 [2020-10-29 09:11:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:58,406 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2020-10-29 09:11:58,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2020-10-29 09:11:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:58,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:58,407 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:58,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:11:58,407 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:58,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2143545448, now seen corresponding path program 3 times [2020-10-29 09:11:58,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:58,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269945325] [2020-10-29 09:11:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:11:59,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:59,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:59,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:59,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:12:00,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269945325] [2020-10-29 09:12:00,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:00,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:00,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24713682] [2020-10-29 09:12:00,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:00,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:00,006 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand 13 states. [2020-10-29 09:12:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:00,760 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-29 09:12:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:00,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:12:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:00,762 INFO L225 Difference]: With dead ends: 132 [2020-10-29 09:12:00,762 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:12:00,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:12:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:12:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2020-10-29 09:12:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:12:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2020-10-29 09:12:00,776 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 35 [2020-10-29 09:12:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:00,776 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2020-10-29 09:12:00,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2020-10-29 09:12:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:12:00,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:00,776 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:00,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:12:00,776 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:00,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1907291982, now seen corresponding path program 1 times [2020-10-29 09:12:00,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:00,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215580942] [2020-10-29 09:12:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:00,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:01,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:01,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:12:01,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:01,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-29 09:12:01,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:01,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:12:01,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:01,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:01,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:01,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:01,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:01,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:01,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:01,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:01,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:01,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:01,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:01,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:01,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:01,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215580942] [2020-10-29 09:12:01,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:01,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:01,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100814321] [2020-10-29 09:12:01,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:01,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:01,710 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand 14 states. [2020-10-29 09:12:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:02,948 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2020-10-29 09:12:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:02,949 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-29 09:12:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:02,950 INFO L225 Difference]: With dead ends: 139 [2020-10-29 09:12:02,950 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:12:02,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:12:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:12:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-10-29 09:12:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-29 09:12:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2020-10-29 09:12:02,966 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 36 [2020-10-29 09:12:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:02,966 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2020-10-29 09:12:02,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2020-10-29 09:12:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:12:02,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:02,967 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:02,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:12:02,967 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash 203933599, now seen corresponding path program 7 times [2020-10-29 09:12:02,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:02,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360240511] [2020-10-29 09:12:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:02,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2529 [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:12:05,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:06,395 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-29 09:12:06,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:06,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:06,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:06,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:06,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:06,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:06,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:06,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:06,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:06,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:06,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360240511] [2020-10-29 09:12:06,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:06,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:12:06,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751618864] [2020-10-29 09:12:06,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:12:06,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:06,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:12:06,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:06,772 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand 17 states. [2020-10-29 09:12:07,274 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-29 09:12:07,753 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-29 09:12:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:08,911 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2020-10-29 09:12:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:12:08,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-29 09:12:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:08,913 INFO L225 Difference]: With dead ends: 144 [2020-10-29 09:12:08,913 INFO L226 Difference]: Without dead ends: 140 [2020-10-29 09:12:08,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:12:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-29 09:12:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2020-10-29 09:12:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:12:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-10-29 09:12:08,929 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 36 [2020-10-29 09:12:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:08,929 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-10-29 09:12:08,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:12:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-10-29 09:12:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:12:08,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:08,930 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:08,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:12:08,930 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash 383651881, now seen corresponding path program 4 times [2020-10-29 09:12:08,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:08,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353031781] [2020-10-29 09:12:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:09,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:11,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:12:11,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:11,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2078 [2020-10-29 09:12:11,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:11,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:11,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:11,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:11,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:12:11,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:11,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:11,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:11,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:11,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353031781] [2020-10-29 09:12:11,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:11,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:11,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566052430] [2020-10-29 09:12:11,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:11,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:11,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:11,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:11,703 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 14 states. [2020-10-29 09:12:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:12,835 INFO L93 Difference]: Finished difference Result 142 states and 173 transitions. [2020-10-29 09:12:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:12,836 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-29 09:12:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:12,837 INFO L225 Difference]: With dead ends: 142 [2020-10-29 09:12:12,837 INFO L226 Difference]: Without dead ends: 134 [2020-10-29 09:12:12,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-29 09:12:12,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120. [2020-10-29 09:12:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-29 09:12:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2020-10-29 09:12:12,854 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 36 [2020-10-29 09:12:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:12,854 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2020-10-29 09:12:12,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2020-10-29 09:12:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:12:12,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:12,855 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:12,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:12:12,855 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1394423834, now seen corresponding path program 8 times [2020-10-29 09:12:12,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:12,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15464738] [2020-10-29 09:12:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:12,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:13,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:13,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:12:13,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:13,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-29 09:12:13,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:13,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:13,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:13,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:13,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:12:13,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:13,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:13,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:13,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:13,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:13,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:13,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:13,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:13,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:13,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:14,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15464738] [2020-10-29 09:12:14,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:14,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:14,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458553990] [2020-10-29 09:12:14,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:14,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:14,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:14,004 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand 15 states. [2020-10-29 09:12:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:16,400 INFO L93 Difference]: Finished difference Result 192 states and 236 transitions. [2020-10-29 09:12:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:12:16,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-29 09:12:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:16,402 INFO L225 Difference]: With dead ends: 192 [2020-10-29 09:12:16,402 INFO L226 Difference]: Without dead ends: 188 [2020-10-29 09:12:16,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:12:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-29 09:12:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2020-10-29 09:12:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:12:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 152 transitions. [2020-10-29 09:12:16,426 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 152 transitions. Word has length 36 [2020-10-29 09:12:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:16,426 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 152 transitions. [2020-10-29 09:12:16,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 152 transitions. [2020-10-29 09:12:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:12:16,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:16,427 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:16,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:12:16,427 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1287772405, now seen corresponding path program 4 times [2020-10-29 09:12:16,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:16,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476843878] [2020-10-29 09:12:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:16,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:16,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:16,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:12:16,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:16,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-29 09:12:16,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:16,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:12:16,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:17,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:17,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:17,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:17,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:17,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:17,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:17,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:17,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:17,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:17,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:17,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:17,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:17,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476843878] [2020-10-29 09:12:17,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:17,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:17,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912505513] [2020-10-29 09:12:17,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:17,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:17,184 INFO L87 Difference]: Start difference. First operand 124 states and 152 transitions. Second operand 14 states. [2020-10-29 09:12:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:17,960 INFO L93 Difference]: Finished difference Result 152 states and 184 transitions. [2020-10-29 09:12:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:17,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-29 09:12:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:17,962 INFO L225 Difference]: With dead ends: 152 [2020-10-29 09:12:17,962 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:12:17,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:12:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2020-10-29 09:12:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-29 09:12:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 154 transitions. [2020-10-29 09:12:17,986 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 154 transitions. Word has length 37 [2020-10-29 09:12:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:17,986 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 154 transitions. [2020-10-29 09:12:17,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 154 transitions. [2020-10-29 09:12:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:12:17,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:17,987 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:17,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:12:17,988 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:17,988 INFO L82 PathProgramCache]: Analyzing trace with hash 357764816, now seen corresponding path program 9 times [2020-10-29 09:12:17,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:17,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174534313] [2020-10-29 09:12:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:18,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:18,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:12:18,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:18,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-29 09:12:18,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:18,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:18,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:12:18,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:18,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:18,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:18,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:18,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:18,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:18,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:12:18,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:18,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:18,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174534313] [2020-10-29 09:12:18,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:18,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:18,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375466224] [2020-10-29 09:12:18,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:18,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:18,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:18,819 INFO L87 Difference]: Start difference. First operand 126 states and 154 transitions. Second operand 14 states. [2020-10-29 09:12:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:20,789 INFO L93 Difference]: Finished difference Result 171 states and 207 transitions. [2020-10-29 09:12:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:12:20,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-29 09:12:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:20,792 INFO L225 Difference]: With dead ends: 171 [2020-10-29 09:12:20,792 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 09:12:20,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:12:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 09:12:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 126. [2020-10-29 09:12:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-29 09:12:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2020-10-29 09:12:20,810 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 37 [2020-10-29 09:12:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:20,810 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2020-10-29 09:12:20,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2020-10-29 09:12:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:12:20,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:20,811 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:20,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:12:20,811 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1170678871, now seen corresponding path program 4 times [2020-10-29 09:12:20,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:20,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164175476] [2020-10-29 09:12:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:21,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:21,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:23,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:23,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:12:23,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:23,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2801 [2020-10-29 09:12:23,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:23,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:23,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:23,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:23,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:12:23,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:12:24,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:24,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:24,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:24,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:24,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:24,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:24,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:24,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:24,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164175476] [2020-10-29 09:12:24,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:24,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:24,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415869091] [2020-10-29 09:12:24,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:24,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:24,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:24,188 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand 14 states. [2020-10-29 09:12:25,443 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-29 09:12:25,692 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-29 09:12:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:26,205 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2020-10-29 09:12:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:12:26,205 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-29 09:12:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:26,206 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:12:26,206 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 09:12:26,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:12:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 09:12:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2020-10-29 09:12:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 09:12:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 155 transitions. [2020-10-29 09:12:26,229 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 155 transitions. Word has length 37 [2020-10-29 09:12:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:26,229 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 155 transitions. [2020-10-29 09:12:26,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 155 transitions. [2020-10-29 09:12:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:12:26,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:26,230 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:26,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:12:26,230 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:26,230 INFO L82 PathProgramCache]: Analyzing trace with hash -860764669, now seen corresponding path program 7 times [2020-10-29 09:12:26,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:26,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510725079] [2020-10-29 09:12:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:26,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:26,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:26,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:28,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:28,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:12:28,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:28,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2592 [2020-10-29 09:12:28,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:28,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:12:28,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:29,172 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-29 09:12:29,592 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-29 09:12:29,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:29,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:29,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:29,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:29,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:29,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:29,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:29,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510725079] [2020-10-29 09:12:29,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:29,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734374197] [2020-10-29 09:12:29,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:29,829 INFO L87 Difference]: Start difference. First operand 128 states and 155 transitions. Second operand 16 states. [2020-10-29 09:12:31,039 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-29 09:12:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:31,760 INFO L93 Difference]: Finished difference Result 182 states and 219 transitions. [2020-10-29 09:12:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:31,760 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 09:12:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:31,762 INFO L225 Difference]: With dead ends: 182 [2020-10-29 09:12:31,762 INFO L226 Difference]: Without dead ends: 178 [2020-10-29 09:12:31,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-29 09:12:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-29 09:12:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-29 09:12:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 160 transitions. [2020-10-29 09:12:31,781 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 160 transitions. Word has length 37 [2020-10-29 09:12:31,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:31,781 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 160 transitions. [2020-10-29 09:12:31,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 160 transitions. [2020-10-29 09:12:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:12:31,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:31,782 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:31,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:12:31,782 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash -273737971, now seen corresponding path program 5 times [2020-10-29 09:12:31,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:31,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334215743] [2020-10-29 09:12:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:31,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:33,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:33,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:12:33,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:33,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-10-29 09:12:33,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:33,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:33,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:33,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:33,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:12:33,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:33,442 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-29 09:12:33,655 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2020-10-29 09:12:34,388 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 62 [2020-10-29 09:12:34,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:34,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:34,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:34,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:34,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:34,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:34,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:34,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:34,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:34,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:34,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:34,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:34,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334215743] [2020-10-29 09:12:34,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:34,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:34,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924911557] [2020-10-29 09:12:34,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:34,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:34,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:34,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:34,586 INFO L87 Difference]: Start difference. First operand 131 states and 160 transitions. Second operand 16 states. [2020-10-29 09:12:35,783 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-29 09:12:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:36,118 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2020-10-29 09:12:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:36,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-29 09:12:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:36,119 INFO L225 Difference]: With dead ends: 161 [2020-10-29 09:12:36,119 INFO L226 Difference]: Without dead ends: 157 [2020-10-29 09:12:36,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-29 09:12:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 134. [2020-10-29 09:12:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-29 09:12:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2020-10-29 09:12:36,139 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 37 [2020-10-29 09:12:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:36,140 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2020-10-29 09:12:36,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2020-10-29 09:12:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:12:36,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:36,140 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:36,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:12:36,140 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash -922283869, now seen corresponding path program 8 times [2020-10-29 09:12:36,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:36,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223125232] [2020-10-29 09:12:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:36,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:41,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:12:41,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:41,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:41,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:41,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:41,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:41,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:41,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:41,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:41,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:41,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:41,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:41,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:41,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:41,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223125232] [2020-10-29 09:12:41,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:41,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445002354] [2020-10-29 09:12:41,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:41,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:41,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:41,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:41,421 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand 12 states. [2020-10-29 09:12:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:42,351 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2020-10-29 09:12:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:42,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-29 09:12:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:42,353 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:12:42,354 INFO L226 Difference]: Without dead ends: 141 [2020-10-29 09:12:42,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-29 09:12:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2020-10-29 09:12:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:12:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2020-10-29 09:12:42,375 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 37 [2020-10-29 09:12:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:42,375 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2020-10-29 09:12:42,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2020-10-29 09:12:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:12:42,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:42,376 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] [2020-10-29 09:12:42,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:12:42,376 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash -224918396, now seen corresponding path program 2 times [2020-10-29 09:12:42,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:42,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902206327] [2020-10-29 09:12:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:42,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:43,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:43,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:12:43,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:43,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1444 [2020-10-29 09:12:43,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:43,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:43,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:12:43,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:43,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:12:43,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:44,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:44,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:44,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:44,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:44,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:44,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:44,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:44,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:44,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:44,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:44,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:12:44,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902206327] [2020-10-29 09:12:44,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:44,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:12:44,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551646996] [2020-10-29 09:12:44,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:12:44,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:44,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:12:44,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:12:44,079 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand 10 states. [2020-10-29 09:12:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:44,947 INFO L93 Difference]: Finished difference Result 165 states and 196 transitions. [2020-10-29 09:12:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:12:44,948 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-29 09:12:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:44,952 INFO L225 Difference]: With dead ends: 165 [2020-10-29 09:12:44,952 INFO L226 Difference]: Without dead ends: 128 [2020-10-29 09:12:44,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-29 09:12:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2020-10-29 09:12:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:12:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2020-10-29 09:12:44,971 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 38 [2020-10-29 09:12:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:44,972 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2020-10-29 09:12:44,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:12:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2020-10-29 09:12:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:12:44,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:44,972 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:44,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:12:44,973 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1560026851, now seen corresponding path program 8 times [2020-10-29 09:12:44,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:44,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167908961] [2020-10-29 09:12:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:45,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:45,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:47,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2204 [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:12:47,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:47,680 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-29 09:12:47,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:47,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:47,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:47,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167908961] [2020-10-29 09:12:47,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:47,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:47,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108923740] [2020-10-29 09:12:47,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:47,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:47,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:47,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:47,928 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand 15 states. [2020-10-29 09:12:48,883 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-29 09:12:49,177 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-29 09:12:49,547 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 81 [2020-10-29 09:12:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:50,438 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2020-10-29 09:12:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:12:50,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:12:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:50,439 INFO L225 Difference]: With dead ends: 162 [2020-10-29 09:12:50,439 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:12:50,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:12:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:12:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 124. [2020-10-29 09:12:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:12:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2020-10-29 09:12:50,463 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 38 [2020-10-29 09:12:50,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:50,463 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2020-10-29 09:12:50,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2020-10-29 09:12:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:12:50,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:50,464 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:50,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:12:50,464 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1740471251, now seen corresponding path program 2 times [2020-10-29 09:12:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:50,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272840269] [2020-10-29 09:12:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:51,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:51,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:12:51,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:51,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1080 [2020-10-29 09:12:51,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:51,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:51,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:51,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:51,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:12:51,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:51,948 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-29 09:12:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:52,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:52,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:52,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:52,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:52,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:52,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:52,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:52,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:52,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:52,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:52,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:52,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272840269] [2020-10-29 09:12:52,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:52,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:52,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802291894] [2020-10-29 09:12:52,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:52,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:52,389 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand 16 states. [2020-10-29 09:12:53,620 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-29 09:12:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:54,065 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2020-10-29 09:12:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:12:54,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-29 09:12:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:54,067 INFO L225 Difference]: With dead ends: 151 [2020-10-29 09:12:54,067 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 09:12:54,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 09:12:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 122. [2020-10-29 09:12:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:12:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-10-29 09:12:54,090 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 38 [2020-10-29 09:12:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:54,091 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-10-29 09:12:54,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-10-29 09:12:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:12:54,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:54,091 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] [2020-10-29 09:12:54,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-29 09:12:54,091 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash 685658766, now seen corresponding path program 6 times [2020-10-29 09:12:54,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:54,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211276644] [2020-10-29 09:12:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:54,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:55,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:55,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:12:55,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:55,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-29 09:12:55,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:55,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:55,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:12:55,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:55,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:55,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:55,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:55,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:55,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:55,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:12:55,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:55,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:55,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:55,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:55,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:55,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:56,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211276644] [2020-10-29 09:12:56,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:56,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:56,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222929211] [2020-10-29 09:12:56,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:56,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:56,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:56,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:56,003 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 15 states. [2020-10-29 09:12:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:57,562 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2020-10-29 09:12:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:12:57,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:12:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:57,564 INFO L225 Difference]: With dead ends: 149 [2020-10-29 09:12:57,564 INFO L226 Difference]: Without dead ends: 141 [2020-10-29 09:12:57,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:12:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-29 09:12:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 122. [2020-10-29 09:12:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:12:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-10-29 09:12:57,583 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 38 [2020-10-29 09:12:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:57,583 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-10-29 09:12:57,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-10-29 09:12:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:12:57,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:57,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:57,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-29 09:12:57,584 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash 37112868, now seen corresponding path program 9 times [2020-10-29 09:12:57,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:57,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316211430] [2020-10-29 09:12:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:57,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:57,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:58,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:58,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:12:58,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:58,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-29 09:12:58,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:58,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:12:58,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:59,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:59,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:59,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:59,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:59,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:59,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:59,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:59,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:59,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:59,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:59,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316211430] [2020-10-29 09:12:59,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:59,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:59,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846170263] [2020-10-29 09:12:59,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:59,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:59,064 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 12 states. [2020-10-29 09:13:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:00,385 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2020-10-29 09:13:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:13:00,386 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-29 09:13:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:00,387 INFO L225 Difference]: With dead ends: 160 [2020-10-29 09:13:00,387 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 09:13:00,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:13:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 09:13:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 127. [2020-10-29 09:13:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:13:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2020-10-29 09:13:00,411 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 38 [2020-10-29 09:13:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:00,411 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2020-10-29 09:13:00,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:13:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2020-10-29 09:13:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:13:00,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:00,412 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:00,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-29 09:13:00,413 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash -355914142, now seen corresponding path program 3 times [2020-10-29 09:13:00,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:00,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247367239] [2020-10-29 09:13:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:00,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:00,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:00,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:02,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2491 [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:13:02,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:03,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:03,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:03,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:03,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:03,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:03,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:03,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-29 09:13:03,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247367239] [2020-10-29 09:13:03,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:03,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:13:03,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767723105] [2020-10-29 09:13:03,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:13:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:13:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:13:03,584 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand 13 states. [2020-10-29 09:13:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:04,426 INFO L93 Difference]: Finished difference Result 167 states and 191 transitions. [2020-10-29 09:13:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:13:04,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-29 09:13:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:04,428 INFO L225 Difference]: With dead ends: 167 [2020-10-29 09:13:04,428 INFO L226 Difference]: Without dead ends: 163 [2020-10-29 09:13:04,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:13:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-29 09:13:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 128. [2020-10-29 09:13:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 09:13:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 149 transitions. [2020-10-29 09:13:04,450 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 149 transitions. Word has length 38 [2020-10-29 09:13:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:04,450 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 149 transitions. [2020-10-29 09:13:04,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:13:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 149 transitions. [2020-10-29 09:13:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:13:04,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:04,451 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-29 09:13:04,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-29 09:13:04,451 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:04,452 INFO L82 PathProgramCache]: Analyzing trace with hash 216831150, now seen corresponding path program 5 times [2020-10-29 09:13:04,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:04,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600102885] [2020-10-29 09:13:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:04,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:05,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:08,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:08,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:13:08,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:08,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3821 [2020-10-29 09:13:08,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:08,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:08,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:13:08,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:08,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:13:08,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:09,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:09,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:09,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:09,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:09,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:09,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:09,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:09,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:09,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:09,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600102885] [2020-10-29 09:13:09,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:09,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:09,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649361668] [2020-10-29 09:13:09,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:09,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:09,189 INFO L87 Difference]: Start difference. First operand 128 states and 149 transitions. Second operand 15 states. [2020-10-29 09:13:11,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:11,073 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2020-10-29 09:13:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:13:11,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:13:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:11,075 INFO L225 Difference]: With dead ends: 185 [2020-10-29 09:13:11,076 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 09:13:11,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:13:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 09:13:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 137. [2020-10-29 09:13:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:13:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2020-10-29 09:13:11,102 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 38 [2020-10-29 09:13:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:11,102 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2020-10-29 09:13:11,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2020-10-29 09:13:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:13:11,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:11,103 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:11,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-29 09:13:11,103 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1227603103, now seen corresponding path program 10 times [2020-10-29 09:13:11,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:11,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713480145] [2020-10-29 09:13:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:11,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:12,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:12,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:13:12,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:12,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 963 [2020-10-29 09:13:12,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:12,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:12,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:12,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:12,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:13:12,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:12,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:12,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:12,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:12,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:12,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:13:12,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:12,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:12,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:12,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:12,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:12,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:12,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713480145] [2020-10-29 09:13:12,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:12,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:12,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572510545] [2020-10-29 09:13:12,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:12,832 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand 16 states. [2020-10-29 09:13:15,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:15,532 INFO L93 Difference]: Finished difference Result 183 states and 215 transitions. [2020-10-29 09:13:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:13:15,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-29 09:13:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:15,534 INFO L225 Difference]: With dead ends: 183 [2020-10-29 09:13:15,534 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:13:15,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:13:15,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:13:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2020-10-29 09:13:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:13:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2020-10-29 09:13:15,565 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 38 [2020-10-29 09:13:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:15,566 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2020-10-29 09:13:15,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2020-10-29 09:13:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:13:15,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:15,567 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:15,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-29 09:13:15,567 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1962088538, now seen corresponding path program 5 times [2020-10-29 09:13:15,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:15,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063062818] [2020-10-29 09:13:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:15,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:16,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:16,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:13:16,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:16,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-29 09:13:16,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:16,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:13:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:13:16,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:16,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:16,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:16,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:16,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:16,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:16,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:16,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:16,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:16,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:16,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063062818] [2020-10-29 09:13:16,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:16,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:13:16,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694168950] [2020-10-29 09:13:16,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:13:16,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:13:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:13:16,576 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand 14 states. [2020-10-29 09:13:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:17,470 INFO L93 Difference]: Finished difference Result 153 states and 178 transitions. [2020-10-29 09:13:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:13:17,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-29 09:13:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:17,473 INFO L225 Difference]: With dead ends: 153 [2020-10-29 09:13:17,473 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:13:17,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:13:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:13:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-29 09:13:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:13:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-10-29 09:13:17,501 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 39 [2020-10-29 09:13:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:17,501 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-10-29 09:13:17,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:13:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-10-29 09:13:17,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:13:17,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:17,502 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:17,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-29 09:13:17,503 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash -518710549, now seen corresponding path program 11 times [2020-10-29 09:13:17,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:17,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895900987] [2020-10-29 09:13:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:17,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:18,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:13:18,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:18,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:18,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:18,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:18,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:18,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:18,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:18,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:18,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:18,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895900987] [2020-10-29 09:13:18,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:18,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:18,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450888888] [2020-10-29 09:13:18,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:18,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:18,957 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 16 states. [2020-10-29 09:13:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:21,345 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2020-10-29 09:13:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:13:21,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-29 09:13:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:21,347 INFO L225 Difference]: With dead ends: 162 [2020-10-29 09:13:21,347 INFO L226 Difference]: Without dead ends: 158 [2020-10-29 09:13:21,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:13:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-29 09:13:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2020-10-29 09:13:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 09:13:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-29 09:13:21,379 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 39 [2020-10-29 09:13:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:21,379 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-29 09:13:21,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-29 09:13:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:13:21,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:21,380 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:21,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-29 09:13:21,380 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash 294203506, now seen corresponding path program 7 times [2020-10-29 09:13:21,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:21,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466137874] [2020-10-29 09:13:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:21,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:22,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:22,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:25,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4141 [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:13:25,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:26,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:26,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:26,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:26,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:26,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:26,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:26,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:26,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:26,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:26,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466137874] [2020-10-29 09:13:26,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:26,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:26,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542774548] [2020-10-29 09:13:26,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:26,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:26,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:26,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:26,124 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 15 states. [2020-10-29 09:13:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:27,376 INFO L93 Difference]: Finished difference Result 156 states and 182 transitions. [2020-10-29 09:13:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:13:27,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-29 09:13:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:27,378 INFO L225 Difference]: With dead ends: 156 [2020-10-29 09:13:27,378 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 09:13:27,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:13:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 09:13:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2020-10-29 09:13:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-29 09:13:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2020-10-29 09:13:27,403 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 39 [2020-10-29 09:13:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:27,403 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2020-10-29 09:13:27,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2020-10-29 09:13:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:13:27,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:27,404 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:27,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-29 09:13:27,404 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:27,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1737240034, now seen corresponding path program 9 times [2020-10-29 09:13:27,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:27,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283085709] [2020-10-29 09:13:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:27,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:27,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:28,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:31,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:31,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:13:31,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:31,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4008 [2020-10-29 09:13:31,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:31,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:31,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:31,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:31,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:13:31,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:31,881 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-29 09:13:32,067 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-29 09:13:32,492 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-29 09:13:32,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:32,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:32,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:32,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:32,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:32,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:32,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:32,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:32,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:32,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:32,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:32,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:32,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283085709] [2020-10-29 09:13:32,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:32,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:32,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422220427] [2020-10-29 09:13:32,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:32,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:32,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:32,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:32,764 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand 17 states. [2020-10-29 09:13:34,413 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-29 09:13:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:35,607 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2020-10-29 09:13:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:13:35,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-29 09:13:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:35,609 INFO L225 Difference]: With dead ends: 169 [2020-10-29 09:13:35,609 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 09:13:35,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:13:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 09:13:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 128. [2020-10-29 09:13:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 09:13:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2020-10-29 09:13:35,634 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 39 [2020-10-29 09:13:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:35,634 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2020-10-29 09:13:35,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2020-10-29 09:13:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:13:35,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:35,635 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:35,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-29 09:13:35,635 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:35,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1143500877, now seen corresponding path program 8 times [2020-10-29 09:13:35,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:35,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014969318] [2020-10-29 09:13:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:35,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:36,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:13:36,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:37,352 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-29 09:13:37,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:37,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:37,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:37,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014969318] [2020-10-29 09:13:37,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:37,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:37,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955236512] [2020-10-29 09:13:37,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:37,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:37,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:37,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:37,627 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand 17 states. [2020-10-29 09:13:38,882 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-29 09:13:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:39,339 INFO L93 Difference]: Finished difference Result 154 states and 183 transitions. [2020-10-29 09:13:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:13:39,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-29 09:13:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:39,341 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:13:39,341 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:13:39,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:13:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:13:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2020-10-29 09:13:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-29 09:13:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 153 transitions. [2020-10-29 09:13:39,372 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 153 transitions. Word has length 40 [2020-10-29 09:13:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:39,372 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 153 transitions. [2020-10-29 09:13:39,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 153 transitions. [2020-10-29 09:13:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:13:39,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:39,373 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] [2020-10-29 09:13:39,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-29 09:13:39,374 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:39,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1367685497, now seen corresponding path program 6 times [2020-10-29 09:13:39,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:39,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200068394] [2020-10-29 09:13:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:39,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:41,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:41,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:13:41,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:41,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2074 [2020-10-29 09:13:41,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:41,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:13:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:41,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:13:41,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:41,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:41,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:41,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:41,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:41,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:41,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:13:41,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:41,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:41,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:41,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:41,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:41,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:41,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200068394] [2020-10-29 09:13:41,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:41,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:41,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125939058] [2020-10-29 09:13:41,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:41,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:41,969 INFO L87 Difference]: Start difference. First operand 130 states and 153 transitions. Second operand 15 states. [2020-10-29 09:13:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:43,102 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2020-10-29 09:13:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:13:43,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:13:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:43,104 INFO L225 Difference]: With dead ends: 158 [2020-10-29 09:13:43,105 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:13:43,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:13:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:13:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 133. [2020-10-29 09:13:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 09:13:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2020-10-29 09:13:43,135 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 40 [2020-10-29 09:13:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:43,135 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2020-10-29 09:13:43,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2020-10-29 09:13:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:13:43,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:43,136 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:43,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-29 09:13:43,136 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1334007906, now seen corresponding path program 10 times [2020-10-29 09:13:43,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:43,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193058370] [2020-10-29 09:13:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:43,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:46,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:46,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:13:46,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2885 [2020-10-29 09:13:46,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:46,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:13:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:46,290 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-29 09:13:46,430 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-29 09:13:46,827 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-29 09:13:47,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:47,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:47,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:47,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193058370] [2020-10-29 09:13:47,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:47,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:47,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535389099] [2020-10-29 09:13:47,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:47,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:47,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:47,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:47,126 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand 17 states. [2020-10-29 09:13:47,365 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2020-10-29 09:13:48,337 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-10-29 09:13:48,835 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-10-29 09:13:49,244 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2020-10-29 09:13:49,574 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2020-10-29 09:13:49,891 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 95 [2020-10-29 09:13:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:50,858 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2020-10-29 09:13:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:13:50,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-29 09:13:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:50,860 INFO L225 Difference]: With dead ends: 173 [2020-10-29 09:13:50,860 INFO L226 Difference]: Without dead ends: 169 [2020-10-29 09:13:50,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:13:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-29 09:13:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2020-10-29 09:13:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-29 09:13:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2020-10-29 09:13:50,886 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 40 [2020-10-29 09:13:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:50,886 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2020-10-29 09:13:50,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2020-10-29 09:13:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:13:50,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:50,887 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:50,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-29 09:13:50,887 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 339538712, now seen corresponding path program 3 times [2020-10-29 09:13:50,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:50,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991006338] [2020-10-29 09:13:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:51,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:52,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:52,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:13:52,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:52,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1438 [2020-10-29 09:13:52,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:52,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:13:52,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:52,996 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-29 09:13:53,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:53,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:53,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:53,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991006338] [2020-10-29 09:13:53,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:53,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:53,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125981911] [2020-10-29 09:13:53,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:53,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:53,275 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand 17 states.