/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:05:08,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:05:08,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:05:08,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:05:08,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:05:08,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:05:08,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:05:08,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:05:08,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:05:08,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:05:08,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:05:08,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:05:08,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:05:08,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:05:08,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:05:08,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:05:08,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:05:08,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:05:08,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:05:08,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:05:08,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:05:08,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:05:08,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:05:08,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:05:08,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:05:08,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:05:08,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:05:08,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:05:08,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:05:08,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:05:08,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:05:08,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:05:08,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:05:08,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:05:08,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:05:08,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:05:08,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:05:08,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:05:08,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:05:08,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:05:08,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:05:08,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:05:09,012 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:05:09,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:05:09,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:05:09,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:05:09,017 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:05:09,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:05:09,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:05:09,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:05:09,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:05:09,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:05:09,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:05:09,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:05:09,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:05:09,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:05:09,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:05:09,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:05:09,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:05:09,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:05:09,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:05:09,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:05:09,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:05:09,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:09,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:05:09,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:05:09,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:05:09,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:05:09,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:05:09,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:05:09,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:05:09,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:05:09,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:05:09,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:05:09,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:05:09,475 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:05:09,476 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:05:09,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-27 01:05:09,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f354d5c5/03012059a920450c8040fffb8b057823/FLAG95973dd61 [2020-10-27 01:05:10,382 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:05:10,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-optional-1.i [2020-10-27 01:05:10,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f354d5c5/03012059a920450c8040fffb8b057823/FLAG95973dd61 [2020-10-27 01:05:10,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f354d5c5/03012059a920450c8040fffb8b057823 [2020-10-27 01:05:10,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:05:10,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:05:10,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:10,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:05:10,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:05:10,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:10" (1/1) ... [2020-10-27 01:05:10,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229ade4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:10, skipping insertion in model container [2020-10-27 01:05:10,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:10" (1/1) ... [2020-10-27 01:05:10,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:05:10,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:05:11,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:11,071 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:05:11,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:11,195 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:05:11,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11 WrapperNode [2020-10-27 01:05:11,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:11,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:05:11,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:05:11,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:05:11,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (1/1) ... [2020-10-27 01:05:11,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (1/1) ... [2020-10-27 01:05:11,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (1/1) ... [2020-10-27 01:05:11,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (1/1) ... [2020-10-27 01:05:11,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (1/1) ... [2020-10-27 01:05:11,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (1/1) ... [2020-10-27 01:05:11,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (1/1) ... [2020-10-27 01:05:11,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:05:11,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:05:11,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:05:11,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:05:11,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (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 [2020-10-27 01:05:11,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:05:11,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:05:11,371 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:05:11,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:05:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:05:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:05:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:05:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:05:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:05:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:05:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:05:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:05:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:05:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:05:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:05:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:05:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:05:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:05:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:05:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:05:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:05:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:05:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:05:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:05:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:05:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:05:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:05:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:05:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:05:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:05:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:05:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:05:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:05:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:05:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:05:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:05:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:05:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:05:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:05:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:05:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:05:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:05:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:05:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:05:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:05:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:05:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:05:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:05:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:05:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:05:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:05:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:05:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:05:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:05:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:05:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:05:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:05:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:05:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:05:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:05:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:05:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:05:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:05:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:05:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:05:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:05:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:05:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:05:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:05:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:05:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:05:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:05:11,389 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:05:11,389 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:05:11,389 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:05:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:05:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:05:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:05:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:05:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:05:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:05:11,390 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:05:11,391 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:05:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:05:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:05:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:05:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:05:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:05:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:05:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:05:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:05:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:05:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:05:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:05:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:05:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:05:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:05:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:05:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:05:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:05:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:05:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:05:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:05:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:05:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:05:11,394 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:05:11,395 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:05:11,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:05:11,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:05:11,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:05:11,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:05:11,395 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:05:11,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:05:11,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:05:11,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:05:11,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:05:11,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:05:11,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:05:11,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:05:11,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:05:11,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:05:11,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:05:11,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:05:12,069 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:05:12,069 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 01:05:12,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:12 BoogieIcfgContainer [2020-10-27 01:05:12,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:05:12,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:05:12,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:05:12,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:05:12,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:05:10" (1/3) ... [2020-10-27 01:05:12,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26adc92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:12, skipping insertion in model container [2020-10-27 01:05:12,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:11" (2/3) ... [2020-10-27 01:05:12,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26adc92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:12, skipping insertion in model container [2020-10-27 01:05:12,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:12" (3/3) ... [2020-10-27 01:05:12,081 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-1.i [2020-10-27 01:05:12,094 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:05:12,100 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:05:12,114 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:05:12,143 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:05:12,143 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:05:12,143 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:05:12,143 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:05:12,143 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:05:12,143 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:05:12,144 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:05:12,144 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:05:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 01:05:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:05:12,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:12,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:12,167 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1827068410, now seen corresponding path program 1 times [2020-10-27 01:05:12,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:12,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305447072] [2020-10-27 01:05:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:12,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:12,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:13,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:13,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:05:13,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:13,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-27 01:05:13,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:13,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:13,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:13,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:05:13,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:05:13,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:13,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:13,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:13,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:13,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:13,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:05:13,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:13,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:13,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:13,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:13,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:13,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305447072] [2020-10-27 01:05:13,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:13,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:13,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460037113] [2020-10-27 01:05:13,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:13,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:13,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:13,595 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 8 states. [2020-10-27 01:05:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:14,250 INFO L93 Difference]: Finished difference Result 112 states and 173 transitions. [2020-10-27 01:05:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:05:14,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:05:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:14,262 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:05:14,263 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:05:14,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:05:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:05:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-27 01:05:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:05:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-27 01:05:14,324 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 21 [2020-10-27 01:05:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:14,325 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-27 01:05:14,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-27 01:05:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:05:14,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:14,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:14,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:05:14,328 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:14,329 INFO L82 PathProgramCache]: Analyzing trace with hash 111622871, now seen corresponding path program 1 times [2020-10-27 01:05:14,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:14,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20348821] [2020-10-27 01:05:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:14,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:14,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:15,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:05:15,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-27 01:05:15,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:05:15,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:15,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:15,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:15,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:15,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:15,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:15,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:15,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:15,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:15,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:15,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:15,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:15,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20348821] [2020-10-27 01:05:15,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:15,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 01:05:15,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399140672] [2020-10-27 01:05:15,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:15,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:15,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:15,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:15,463 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 9 states. [2020-10-27 01:05:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:15,993 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2020-10-27 01:05:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:05:15,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:05:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:15,997 INFO L225 Difference]: With dead ends: 81 [2020-10-27 01:05:15,997 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:05:16,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:05:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:05:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2020-10-27 01:05:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:05:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-27 01:05:16,024 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2020-10-27 01:05:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:16,026 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-27 01:05:16,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-27 01:05:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:05:16,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:16,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:16,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:05:16,034 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash 791681241, now seen corresponding path program 1 times [2020-10-27 01:05:16,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:16,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353737003] [2020-10-27 01:05:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:16,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:16,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:05:16,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:16,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-27 01:05:16,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:05:16,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:16,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:16,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:16,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:16,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:16,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:16,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:16,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:16,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:16,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353737003] [2020-10-27 01:05:16,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:16,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:16,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912424646] [2020-10-27 01:05:16,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:16,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:16,648 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2020-10-27 01:05:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:17,049 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-10-27 01:05:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:17,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:05:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:17,053 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:05:17,053 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:05:17,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:05:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-27 01:05:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:05:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 01:05:17,063 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 22 [2020-10-27 01:05:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:17,063 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 01:05:17,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 01:05:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:05:17,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:17,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:17,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:05:17,065 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash 19277548, now seen corresponding path program 1 times [2020-10-27 01:05:17,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:17,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24241399] [2020-10-27 01:05:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:18,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:05:18,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:18,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-27 01:05:18,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:18,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:18,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:18,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:05:18,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:18,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:18,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:18,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:18,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:18,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:05:18,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:18,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:18,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:18,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:18,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:18,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24241399] [2020-10-27 01:05:18,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:18,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:18,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67428482] [2020-10-27 01:05:18,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:18,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:18,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:18,283 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2020-10-27 01:05:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:18,837 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2020-10-27 01:05:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:05:18,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:05:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:18,839 INFO L225 Difference]: With dead ends: 97 [2020-10-27 01:05:18,840 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:05:18,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:05:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:05:18,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 48. [2020-10-27 01:05:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:05:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-10-27 01:05:18,850 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 23 [2020-10-27 01:05:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:18,850 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-10-27 01:05:18,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-10-27 01:05:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:05:18,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:18,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:18,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:05:18,852 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1794284910, now seen corresponding path program 1 times [2020-10-27 01:05:18,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:18,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247416949] [2020-10-27 01:05:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:18,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:05:19,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:19,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-27 01:05:19,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:19,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:05:19,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:05:19,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:19,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:19,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:19,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:19,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:19,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:19,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:19,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247416949] [2020-10-27 01:05:19,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:19,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:19,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818929438] [2020-10-27 01:05:19,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:19,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:19,490 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 6 states. [2020-10-27 01:05:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:19,767 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2020-10-27 01:05:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:19,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:05:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:19,769 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:05:19,770 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:05:19,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:05:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2020-10-27 01:05:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:05:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-10-27 01:05:19,791 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 23 [2020-10-27 01:05:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:19,791 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-10-27 01:05:19,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-10-27 01:05:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:05:19,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:19,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:19,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:05:19,798 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:19,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1820624016, now seen corresponding path program 1 times [2020-10-27 01:05:19,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:19,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257741754] [2020-10-27 01:05:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:05:19,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:19,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-27 01:05:19,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:05:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:05:19,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:19,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:19,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:19,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:19,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:19,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:19,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:19,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:19,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:19,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:19,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:19,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257741754] [2020-10-27 01:05:19,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:19,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:19,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770297534] [2020-10-27 01:05:19,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:19,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:19,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:19,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:19,994 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 6 states. [2020-10-27 01:05:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:20,261 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2020-10-27 01:05:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:20,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:05:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:20,263 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:05:20,263 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 01:05:20,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 01:05:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-27 01:05:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:05:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-27 01:05:20,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 23 [2020-10-27 01:05:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:20,279 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-27 01:05:20,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-27 01:05:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:05:20,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:20,280 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:20,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:05:20,281 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1378432434, now seen corresponding path program 1 times [2020-10-27 01:05:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:20,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998096304] [2020-10-27 01:05:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:20,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:21,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:05:21,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:21,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-27 01:05:21,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:21,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:21,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:05:21,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:21,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:21,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:21,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:21,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:21,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:21,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:21,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:21,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:21,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:21,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:21,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998096304] [2020-10-27 01:05:21,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:21,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:21,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610086480] [2020-10-27 01:05:21,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:21,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:21,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:21,709 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 11 states. [2020-10-27 01:05:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:22,586 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-10-27 01:05:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:22,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 01:05:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:22,588 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:05:22,588 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:05:22,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:05:22,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:05:22,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2020-10-27 01:05:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:05:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-10-27 01:05:22,600 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 25 [2020-10-27 01:05:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:22,600 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-10-27 01:05:22,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-10-27 01:05:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:05:22,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:22,602 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:22,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:05:22,602 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:22,603 INFO L82 PathProgramCache]: Analyzing trace with hash 396574928, now seen corresponding path program 1 times [2020-10-27 01:05:22,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:22,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660961071] [2020-10-27 01:05:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:22,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:22,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:23,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:05:24,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:24,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2368 [2020-10-27 01:05:24,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:24,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:24,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:05:24,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:25,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:25,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:25,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:25,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:25,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:25,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:25,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:25,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:25,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:25,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660961071] [2020-10-27 01:05:25,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:25,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:25,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707477731] [2020-10-27 01:05:25,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:25,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:25,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:25,182 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 11 states. [2020-10-27 01:05:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:25,725 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2020-10-27 01:05:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:25,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 01:05:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:25,727 INFO L225 Difference]: With dead ends: 109 [2020-10-27 01:05:25,727 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:05:25,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:05:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-10-27 01:05:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:05:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-10-27 01:05:25,742 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 25 [2020-10-27 01:05:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:25,743 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-10-27 01:05:25,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-10-27 01:05:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:05:25,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:25,745 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:25,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:05:25,746 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:25,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:25,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1076633298, now seen corresponding path program 1 times [2020-10-27 01:05:25,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:25,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278895783] [2020-10-27 01:05:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:27,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:05:27,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:27,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1937 [2020-10-27 01:05:27,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:05:27,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:27,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:27,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:27,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:27,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:27,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:27,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:28,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278895783] [2020-10-27 01:05:28,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:28,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:28,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503406529] [2020-10-27 01:05:28,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:28,007 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 9 states. [2020-10-27 01:05:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:28,703 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2020-10-27 01:05:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:28,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 01:05:28,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:28,705 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:05:28,706 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:05:28,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:05:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:05:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 68. [2020-10-27 01:05:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:05:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2020-10-27 01:05:28,735 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 25 [2020-10-27 01:05:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:28,735 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2020-10-27 01:05:28,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2020-10-27 01:05:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:05:28,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:28,737 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:28,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:05:28,738 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:28,738 INFO L82 PathProgramCache]: Analyzing trace with hash 243059799, now seen corresponding path program 1 times [2020-10-27 01:05:28,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:28,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863775100] [2020-10-27 01:05:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:28,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:28,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:05:33,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:05:33,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:05:33,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:33,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:33,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:05:33,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:34,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:34,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:34,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:34,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863775100] [2020-10-27 01:05:34,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:34,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:34,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617429923] [2020-10-27 01:05:34,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:34,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:34,138 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 11 states. [2020-10-27 01:05:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:35,762 INFO L93 Difference]: Finished difference Result 143 states and 183 transitions. [2020-10-27 01:05:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:05:35,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 01:05:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:35,764 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:05:35,765 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:05:35,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:05:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:05:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 78. [2020-10-27 01:05:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:05:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2020-10-27 01:05:35,792 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 26 [2020-10-27 01:05:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:35,792 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2020-10-27 01:05:35,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2020-10-27 01:05:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:05:35,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:35,793 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:35,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:05:35,794 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2018067161, now seen corresponding path program 1 times [2020-10-27 01:05:35,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:35,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950938415] [2020-10-27 01:05:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:38,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:38,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:05:38,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3019 [2020-10-27 01:05:38,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:05:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:39,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:39,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:39,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:39,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:39,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:39,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:39,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:39,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:39,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:39,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950938415] [2020-10-27 01:05:39,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:39,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:39,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715594563] [2020-10-27 01:05:39,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:39,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:39,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:39,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:39,226 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand 10 states. [2020-10-27 01:05:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:40,206 INFO L93 Difference]: Finished difference Result 140 states and 182 transitions. [2020-10-27 01:05:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:40,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:05:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:40,208 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:05:40,208 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 01:05:40,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 01:05:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 73. [2020-10-27 01:05:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:05:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2020-10-27 01:05:40,224 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 26 [2020-10-27 01:05:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:40,225 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2020-10-27 01:05:40,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2020-10-27 01:05:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:05:40,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:40,226 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:40,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:05:40,226 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:40,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1685773215, now seen corresponding path program 1 times [2020-10-27 01:05:40,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:40,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811664585] [2020-10-27 01:05:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:40,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:05:42,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:42,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1947 [2020-10-27 01:05:42,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:05:42,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:42,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:42,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:42,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:05:42,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:42,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:42,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:42,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:42,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811664585] [2020-10-27 01:05:42,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:42,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:05:42,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518933483] [2020-10-27 01:05:42,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:05:42,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:05:42,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:42,472 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 12 states. [2020-10-27 01:05:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:43,181 INFO L93 Difference]: Finished difference Result 111 states and 141 transitions. [2020-10-27 01:05:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:43,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-27 01:05:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:43,182 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:05:43,183 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:05:43,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:05:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2020-10-27 01:05:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:05:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-10-27 01:05:43,194 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 26 [2020-10-27 01:05:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:43,195 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-10-27 01:05:43,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:05:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-10-27 01:05:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:05:43,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:43,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:43,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:05:43,196 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:43,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1672684518, now seen corresponding path program 1 times [2020-10-27 01:05:43,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:43,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155024288] [2020-10-27 01:05:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:05:43,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:43,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 01:05:43,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:05:43,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:43,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:43,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:43,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:43,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:43,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:43,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:43,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155024288] [2020-10-27 01:05:43,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:43,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:05:43,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974121879] [2020-10-27 01:05:43,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:05:43,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:43,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:05:43,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:05:43,434 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 7 states. [2020-10-27 01:05:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:43,789 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-10-27 01:05:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:43,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 01:05:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:43,791 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:05:43,791 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:05:43,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:05:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-27 01:05:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:05:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-27 01:05:43,801 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 32 [2020-10-27 01:05:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:43,801 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-27 01:05:43,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:05:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-27 01:05:43,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:05:43,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:43,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:43,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:05:43,803 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:43,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:43,803 INFO L82 PathProgramCache]: Analyzing trace with hash -331841837, now seen corresponding path program 1 times [2020-10-27 01:05:43,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:43,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576530797] [2020-10-27 01:05:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:05:45,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:45,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1563 [2020-10-27 01:05:45,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:05:45,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:45,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:45,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:45,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:45,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576530797] [2020-10-27 01:05:45,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:45,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:45,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801170636] [2020-10-27 01:05:45,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:45,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:45,742 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 11 states. [2020-10-27 01:05:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:46,893 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2020-10-27 01:05:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:05:46,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:05:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:46,895 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:05:46,895 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:05:46,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:05:46,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:05:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2020-10-27 01:05:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:05:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2020-10-27 01:05:46,915 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 35 [2020-10-27 01:05:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:46,915 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2020-10-27 01:05:46,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2020-10-27 01:05:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:05:46,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:46,918 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:46,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:05:46,918 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1443165525, now seen corresponding path program 1 times [2020-10-27 01:05:46,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:46,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469061038] [2020-10-27 01:05:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:51,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:05:51,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:05:51,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 01:05:51,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:05:51,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:52,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:52,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:52,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:52,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:52,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:52,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:52,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:52,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:52,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:52,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469061038] [2020-10-27 01:05:52,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:52,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:52,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202315291] [2020-10-27 01:05:52,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:52,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:52,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:52,293 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 11 states. [2020-10-27 01:05:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:53,149 INFO L93 Difference]: Finished difference Result 136 states and 177 transitions. [2020-10-27 01:05:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:05:53,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:05:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:53,152 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:05:53,152 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:05:53,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:05:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:05:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2020-10-27 01:05:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:05:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2020-10-27 01:05:53,166 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 35 [2020-10-27 01:05:53,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:53,167 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2020-10-27 01:05:53,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2020-10-27 01:05:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:05:53,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:53,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:53,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:05:53,168 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:53,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2123223895, now seen corresponding path program 1 times [2020-10-27 01:05:53,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:53,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303458993] [2020-10-27 01:05:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:53,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:55,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:55,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:57,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:05:57,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:05:57,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4159 [2020-10-27 01:05:57,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:57,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:05:57,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:57,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:57,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:57,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:57,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:57,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:57,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:57,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:57,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:57,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:57,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303458993] [2020-10-27 01:05:57,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:57,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:57,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958482054] [2020-10-27 01:05:57,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:57,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:57,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:57,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:57,727 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 11 states. [2020-10-27 01:05:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:58,648 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-10-27 01:05:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:05:58,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:05:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:58,650 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:05:58,650 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:05:58,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:05:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-10-27 01:05:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:05:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2020-10-27 01:05:58,667 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 35 [2020-10-27 01:05:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:58,669 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2020-10-27 01:05:58,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2020-10-27 01:05:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:05:58,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:58,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:58,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:05:58,671 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1334779298, now seen corresponding path program 1 times [2020-10-27 01:05:58,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:58,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852950345] [2020-10-27 01:05:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:03,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:06:03,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 01:06:03,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:06:03,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:03,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:03,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:03,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:06:03,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:04,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:04,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:04,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:04,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:04,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:04,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:04,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:04,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:04,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:04,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:04,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:04,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852950345] [2020-10-27 01:06:04,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:04,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:04,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469475463] [2020-10-27 01:06:04,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:04,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:04,234 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand 13 states. [2020-10-27 01:06:04,800 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-27 01:06:05,650 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-27 01:06:05,909 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 01:06:06,191 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 01:06:06,441 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:06:06,687 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 01:06:06,922 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 01:06:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:07,056 INFO L93 Difference]: Finished difference Result 186 states and 234 transitions. [2020-10-27 01:06:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:06:07,057 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 01:06:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:07,059 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:06:07,059 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:06:07,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:06:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:06:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 108. [2020-10-27 01:06:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 01:06:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2020-10-27 01:06:07,079 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 36 [2020-10-27 01:06:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:07,079 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2020-10-27 01:06:07,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2020-10-27 01:06:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:06:07,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:07,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:07,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:06:07,081 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1475327908, now seen corresponding path program 1 times [2020-10-27 01:06:07,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:07,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260047203] [2020-10-27 01:06:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:06:12,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 01:06:12,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:06:12,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:12,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:06:12,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:12,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:12,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:12,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:12,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:12,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:12,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:12,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:12,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260047203] [2020-10-27 01:06:12,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:12,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:12,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406268681] [2020-10-27 01:06:12,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:12,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:12,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:12,531 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand 13 states. [2020-10-27 01:06:14,464 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-27 01:06:14,748 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-27 01:06:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:16,040 INFO L93 Difference]: Finished difference Result 323 states and 416 transitions. [2020-10-27 01:06:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:06:16,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 01:06:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:16,044 INFO L225 Difference]: With dead ends: 323 [2020-10-27 01:06:16,044 INFO L226 Difference]: Without dead ends: 296 [2020-10-27 01:06:16,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=611, Invalid=2251, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:06:16,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-27 01:06:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 143. [2020-10-27 01:06:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:06:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 182 transitions. [2020-10-27 01:06:16,072 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 182 transitions. Word has length 36 [2020-10-27 01:06:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:16,072 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 182 transitions. [2020-10-27 01:06:16,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 182 transitions. [2020-10-27 01:06:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:06:16,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:16,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:16,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:06:16,073 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:16,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:16,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2139581018, now seen corresponding path program 1 times [2020-10-27 01:06:16,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:16,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808289623] [2020-10-27 01:06:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:21,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:06:21,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 01:06:21,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:06:21,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:06:21,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:21,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:21,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:21,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:21,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:21,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:21,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:21,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:21,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:21,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:21,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808289623] [2020-10-27 01:06:21,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:21,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:21,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533135017] [2020-10-27 01:06:21,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:21,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:21,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:21,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:21,521 INFO L87 Difference]: Start difference. First operand 143 states and 182 transitions. Second operand 12 states. [2020-10-27 01:06:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:23,348 INFO L93 Difference]: Finished difference Result 255 states and 318 transitions. [2020-10-27 01:06:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:06:23,348 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-27 01:06:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:23,350 INFO L225 Difference]: With dead ends: 255 [2020-10-27 01:06:23,350 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 01:06:23,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:06:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 01:06:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 167. [2020-10-27 01:06:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:06:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 212 transitions. [2020-10-27 01:06:23,382 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 212 transitions. Word has length 36 [2020-10-27 01:06:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:23,382 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 212 transitions. [2020-10-27 01:06:23,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 212 transitions. [2020-10-27 01:06:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:06:23,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:23,384 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:23,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:06:23,384 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:23,384 INFO L82 PathProgramCache]: Analyzing trace with hash -364573656, now seen corresponding path program 1 times [2020-10-27 01:06:23,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:23,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618470065] [2020-10-27 01:06:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:23,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:24,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:06:24,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:06:24,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1488 [2020-10-27 01:06:24,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:06:24,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:25,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:25,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:25,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:25,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:25,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:25,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:25,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:25,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618470065] [2020-10-27 01:06:25,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:25,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873205349] [2020-10-27 01:06:25,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:25,291 INFO L87 Difference]: Start difference. First operand 167 states and 212 transitions. Second operand 10 states. [2020-10-27 01:06:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:26,350 INFO L93 Difference]: Finished difference Result 217 states and 275 transitions. [2020-10-27 01:06:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:26,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-27 01:06:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:26,356 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:06:26,356 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 01:06:26,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 01:06:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 155. [2020-10-27 01:06:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:06:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 196 transitions. [2020-10-27 01:06:26,386 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 196 transitions. Word has length 36 [2020-10-27 01:06:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:26,387 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 196 transitions. [2020-10-27 01:06:26,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 196 transitions. [2020-10-27 01:06:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:26,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:26,387 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:26,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:06:26,388 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1516615034, now seen corresponding path program 2 times [2020-10-27 01:06:26,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:26,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834875948] [2020-10-27 01:06:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:26,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:28,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:28,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:28,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:28,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2079 [2020-10-27 01:06:28,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:06:28,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:28,773 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-10-27 01:06:29,205 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-27 01:06:29,604 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-27 01:06:30,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:30,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:30,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:30,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:30,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:30,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:30,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:30,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:30,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:30,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:30,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:30,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834875948] [2020-10-27 01:06:30,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:30,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:30,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913988831] [2020-10-27 01:06:30,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:30,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:30,050 INFO L87 Difference]: Start difference. First operand 155 states and 196 transitions. Second operand 14 states. [2020-10-27 01:06:30,463 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-27 01:06:30,691 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2020-10-27 01:06:30,863 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-27 01:06:31,152 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 01:06:31,404 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 01:06:31,765 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-27 01:06:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:32,709 INFO L93 Difference]: Finished difference Result 294 states and 369 transitions. [2020-10-27 01:06:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:06:32,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 01:06:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:32,711 INFO L225 Difference]: With dead ends: 294 [2020-10-27 01:06:32,711 INFO L226 Difference]: Without dead ends: 268 [2020-10-27 01:06:32,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:06:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-27 01:06:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 197. [2020-10-27 01:06:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 01:06:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 250 transitions. [2020-10-27 01:06:32,742 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 250 transitions. Word has length 38 [2020-10-27 01:06:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:32,742 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 250 transitions. [2020-10-27 01:06:32,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 250 transitions. [2020-10-27 01:06:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:32,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:32,743 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:32,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:06:32,744 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:32,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:32,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1003344900, now seen corresponding path program 2 times [2020-10-27 01:06:32,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:32,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759763374] [2020-10-27 01:06:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:32,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:34,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:35,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:35,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:35,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:36,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:37,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:37,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:37,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:06:37,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:06:37,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:37,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:06:37,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:38,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:38,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:38,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:38,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:38,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:38,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:38,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:38,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:38,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:38,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759763374] [2020-10-27 01:06:38,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:38,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:38,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034080533] [2020-10-27 01:06:38,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:38,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:38,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:38,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:38,322 INFO L87 Difference]: Start difference. First operand 197 states and 250 transitions. Second operand 13 states. [2020-10-27 01:06:39,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:39,480 INFO L93 Difference]: Finished difference Result 318 states and 406 transitions. [2020-10-27 01:06:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:39,483 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 01:06:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:39,485 INFO L225 Difference]: With dead ends: 318 [2020-10-27 01:06:39,485 INFO L226 Difference]: Without dead ends: 292 [2020-10-27 01:06:39,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:06:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-27 01:06:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 227. [2020-10-27 01:06:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 01:06:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 288 transitions. [2020-10-27 01:06:39,519 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 288 transitions. Word has length 38 [2020-10-27 01:06:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:39,519 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 288 transitions. [2020-10-27 01:06:39,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 288 transitions. [2020-10-27 01:06:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:39,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:39,521 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:39,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:06:39,521 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash -323286530, now seen corresponding path program 2 times [2020-10-27 01:06:39,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:39,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226396157] [2020-10-27 01:06:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:39,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:39,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:40,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:40,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:41,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:41,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:41,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:42,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:42,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:06:44,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,097 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 01:06:45,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:45,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:45,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:45,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:45,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:45,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:45,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:45,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:45,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:45,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226396157] [2020-10-27 01:06:45,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:45,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:45,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278485361] [2020-10-27 01:06:45,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:45,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:45,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:45,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:45,345 INFO L87 Difference]: Start difference. First operand 227 states and 288 transitions. Second operand 14 states. [2020-10-27 01:06:46,196 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 01:06:46,439 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-27 01:06:46,734 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 01:06:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:47,342 INFO L93 Difference]: Finished difference Result 300 states and 375 transitions. [2020-10-27 01:06:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:47,343 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 01:06:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:47,344 INFO L225 Difference]: With dead ends: 300 [2020-10-27 01:06:47,344 INFO L226 Difference]: Without dead ends: 262 [2020-10-27 01:06:47,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:06:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-27 01:06:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2020-10-27 01:06:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-27 01:06:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 247 transitions. [2020-10-27 01:06:47,379 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 247 transitions. Word has length 38 [2020-10-27 01:06:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:47,379 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 247 transitions. [2020-10-27 01:06:47,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 247 transitions. [2020-10-27 01:06:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:06:47,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:47,380 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:47,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:06:47,380 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:47,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1492599845, now seen corresponding path program 1 times [2020-10-27 01:06:47,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:47,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666959080] [2020-10-27 01:06:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:47,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:49,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:49,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:06:49,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:49,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-27 01:06:49,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:49,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:49,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:06:49,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:49,615 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-27 01:06:49,849 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-27 01:06:50,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:50,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:50,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:50,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:50,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:50,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:50,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:50,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:50,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666959080] [2020-10-27 01:06:50,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:50,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:50,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983142394] [2020-10-27 01:06:50,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:50,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:50,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:50,196 INFO L87 Difference]: Start difference. First operand 193 states and 247 transitions. Second operand 14 states. [2020-10-27 01:06:50,628 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-27 01:06:50,914 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-27 01:06:51,122 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-27 01:06:51,429 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 01:06:51,668 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 01:06:52,084 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-27 01:06:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:52,889 INFO L93 Difference]: Finished difference Result 292 states and 366 transitions. [2020-10-27 01:06:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:06:52,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 01:06:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:52,891 INFO L225 Difference]: With dead ends: 292 [2020-10-27 01:06:52,891 INFO L226 Difference]: Without dead ends: 266 [2020-10-27 01:06:52,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:06:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-27 01:06:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 201. [2020-10-27 01:06:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 01:06:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 257 transitions. [2020-10-27 01:06:52,926 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 257 transitions. Word has length 39 [2020-10-27 01:06:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:52,926 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 257 transitions. [2020-10-27 01:06:52,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:06:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 257 transitions. [2020-10-27 01:06:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:06:52,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:52,928 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:52,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:06:52,928 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash 962465887, now seen corresponding path program 1 times [2020-10-27 01:06:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:52,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929280825] [2020-10-27 01:06:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:57,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:06:57,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:06:57,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:06:57,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:57,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:57,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:57,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:06:57,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:58,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:58,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:58,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:58,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:06:58,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:58,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:58,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:58,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929280825] [2020-10-27 01:06:58,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:58,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:58,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176146808] [2020-10-27 01:06:58,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:58,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:58,435 INFO L87 Difference]: Start difference. First operand 201 states and 257 transitions. Second operand 12 states. [2020-10-27 01:06:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:59,438 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2020-10-27 01:06:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:59,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 01:06:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:59,440 INFO L225 Difference]: With dead ends: 278 [2020-10-27 01:06:59,440 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 01:06:59,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 01:06:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 163. [2020-10-27 01:06:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 01:06:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 210 transitions. [2020-10-27 01:06:59,474 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 210 transitions. Word has length 39 [2020-10-27 01:06:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:59,474 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 210 transitions. [2020-10-27 01:06:59,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 210 transitions. [2020-10-27 01:06:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:06:59,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:59,475 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:59,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:06:59,476 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2004906059, now seen corresponding path program 2 times [2020-10-27 01:06:59,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:59,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212578041] [2020-10-27 01:06:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:59,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:59,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:02,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:02,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:04,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:04,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:07:04,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:07:04,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:07:04,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:04,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:04,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:04,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:07:04,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:04,950 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:07:05,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:05,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:05,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:05,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:05,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:05,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:05,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:05,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:05,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212578041] [2020-10-27 01:07:05,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:05,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:07:05,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490065104] [2020-10-27 01:07:05,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:07:05,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:05,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:07:05,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:05,423 INFO L87 Difference]: Start difference. First operand 163 states and 210 transitions. Second operand 16 states. [2020-10-27 01:07:06,135 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-27 01:07:06,450 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-27 01:07:06,883 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-27 01:07:07,347 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-27 01:07:07,528 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-27 01:07:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:08,175 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2020-10-27 01:07:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:07:08,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 01:07:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:08,177 INFO L225 Difference]: With dead ends: 280 [2020-10-27 01:07:08,177 INFO L226 Difference]: Without dead ends: 276 [2020-10-27 01:07:08,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:07:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-27 01:07:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2020-10-27 01:07:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-27 01:07:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 264 transitions. [2020-10-27 01:07:08,217 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 264 transitions. Word has length 39 [2020-10-27 01:07:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:08,218 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 264 transitions. [2020-10-27 01:07:08,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:07:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 264 transitions. [2020-10-27 01:07:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:07:08,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:08,219 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:08,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:07:08,219 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1357415190, now seen corresponding path program 1 times [2020-10-27 01:07:08,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:08,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435106720] [2020-10-27 01:07:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:08,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:08,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:08,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:08,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:09,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:09,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:13,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:13,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:07:13,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:07:13,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:07:13,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:07:13,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:13,300 ERROR L253 erpolLogProxyWrapper]: Interpolant 30 not inductive [2020-10-27 01:07:13,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:07:13,303 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 01:07:13,312 INFO L168 Benchmark]: Toolchain (without parser) took 122704.90 ms. Allocated memory was 155.2 MB in the beginning and 973.1 MB in the end (delta: 817.9 MB). Free memory was 129.5 MB in the beginning and 524.3 MB in the end (delta: -394.7 MB). Peak memory consumption was 579.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:07:13,313 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory was 127.4 MB in the beginning and 127.3 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:07:13,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 580.38 ms. Allocated memory is still 155.2 MB. Free memory was 128.8 MB in the beginning and 106.7 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:07:13,314 INFO L168 Benchmark]: Boogie Preprocessor took 75.87 ms. Allocated memory is still 155.2 MB. Free memory was 106.7 MB in the beginning and 103.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:07:13,314 INFO L168 Benchmark]: RCFGBuilder took 796.85 ms. Allocated memory is still 155.2 MB. Free memory was 103.8 MB in the beginning and 92.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:07:13,315 INFO L168 Benchmark]: TraceAbstraction took 121236.46 ms. Allocated memory was 155.2 MB in the beginning and 973.1 MB in the end (delta: 817.9 MB). Free memory was 92.4 MB in the beginning and 524.3 MB in the end (delta: -431.9 MB). Peak memory consumption was 541.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:07:13,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory was 127.4 MB in the beginning and 127.3 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 580.38 ms. Allocated memory is still 155.2 MB. Free memory was 128.8 MB in the beginning and 106.7 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.87 ms. Allocated memory is still 155.2 MB. Free memory was 106.7 MB in the beginning and 103.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 796.85 ms. Allocated memory is still 155.2 MB. Free memory was 103.8 MB in the beginning and 92.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 121236.46 ms. Allocated memory was 155.2 MB in the beginning and 973.1 MB in the end (delta: 817.9 MB). Free memory was 92.4 MB in the beginning and 524.3 MB in the end (delta: -431.9 MB). Peak memory consumption was 541.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...