/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-token-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:10:15,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:10:15,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:10:15,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:10:15,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:10:15,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:10:15,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:10:15,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:10:15,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:10:15,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:10:15,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:10:15,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:10:15,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:10:15,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:10:15,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:10:15,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:10:15,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:10:15,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:10:15,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:10:15,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:10:15,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:10:15,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:10:15,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:10:15,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:10:15,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:10:15,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:10:15,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:10:15,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:10:15,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:10:15,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:10:15,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:10:15,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:10:15,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:10:15,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:10:15,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:10:15,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:10:15,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:10:15,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:10:15,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:10:15,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:10:15,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:10:15,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:10:15,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:10:15,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:10:15,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:10:15,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:10:15,469 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:10:15,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:10:15,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:10:15,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:10:15,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:10:15,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:10:15,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:10:15,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:10:15,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:10:15,472 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:10:15,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:10:15,472 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:10:15,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:10:15,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:10:15,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:10:15,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:10:15,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:10:15,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:15,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:10:15,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:10:15,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:10:15,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:10:15,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:10:15,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:10:15,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:10:15,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:10:16,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:10:16,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:10:16,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:10:16,073 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:10:16,073 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:10:16,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-token-1.i [2020-10-29 09:10:16,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7104e4dc6/6c336c960b174013a86a1a2bdc0cf54f/FLAG1c0b36f23 [2020-10-29 09:10:17,026 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:10:17,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-token-1.i [2020-10-29 09:10:17,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7104e4dc6/6c336c960b174013a86a1a2bdc0cf54f/FLAG1c0b36f23 [2020-10-29 09:10:17,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7104e4dc6/6c336c960b174013a86a1a2bdc0cf54f [2020-10-29 09:10:17,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:10:17,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:10:17,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:17,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:10:17,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:10:17,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a7f9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17, skipping insertion in model container [2020-10-29 09:10:17,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:10:17,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:10:17,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:17,767 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:10:17,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:17,875 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:10:17,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17 WrapperNode [2020-10-29 09:10:17,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:17,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:10:17,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:10:17,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:10:17,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (1/1) ... [2020-10-29 09:10:17,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:10:17,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:10:17,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:10:17,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:10:17,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:18,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:10:18,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:10:18,050 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:10:18,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:10:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:10:18,051 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:10:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:10:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:10:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:10:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:10:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:10:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:10:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:10:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:10:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:10:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:10:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:10:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:10:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:10:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:10:18,058 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:10:18,058 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:10:18,058 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:10:18,058 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:10:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:10:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:10:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:10:18,065 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:10:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:10:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:10:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:10:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:10:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:10:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:10:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:10:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:10:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:10:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:10:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:10:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:10:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:10:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:10:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:10:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:10:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:10:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:10:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:10:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:10:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:10:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:10:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:10:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:10:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:10:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:10:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:10:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:10:18,073 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:10:18,073 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:10:18,073 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:10:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:10:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:10:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:10:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:10:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:10:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:10:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:10:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:10:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:10:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:10:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:10:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:10:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:10:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:10:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:10:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:10:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:10:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:10:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:10:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:10:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:10:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:10:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:10:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:10:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:10:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:10:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:10:18,082 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:10:18,082 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:10:18,082 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:10:18,082 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:10:18,082 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:10:18,082 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:10:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:10:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:10:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:10:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:10:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:10:18,083 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:10:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:10:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:10:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:10:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:10:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:10:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:10:18,084 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:10:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:10:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:10:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:10:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:10:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:10:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:10:18,085 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:10:18,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:10:18,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:10:18,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:10:18,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:10:18,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:10:18,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:10:18,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:10:18,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:10:18,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:10:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:10:18,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:10:18,713 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:10:18,713 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-10-29 09:10:18,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:18 BoogieIcfgContainer [2020-10-29 09:10:18,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:10:18,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:10:18,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:10:18,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:10:18,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:10:17" (1/3) ... [2020-10-29 09:10:18,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d77a1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:18, skipping insertion in model container [2020-10-29 09:10:18,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:17" (2/3) ... [2020-10-29 09:10:18,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d77a1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:18, skipping insertion in model container [2020-10-29 09:10:18,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:18" (3/3) ... [2020-10-29 09:10:18,724 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-1.i [2020-10-29 09:10:18,737 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:10:18,743 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:10:18,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:10:18,785 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:10:18,786 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:10:18,786 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:10:18,786 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:10:18,786 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:10:18,786 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:10:18,786 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:10:18,786 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:10:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-29 09:10:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:10:18,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:18,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:18,813 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash 856451337, now seen corresponding path program 1 times [2020-10-29 09:10:18,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:18,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113084204] [2020-10-29 09:10:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:19,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-29 09:10:19,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:19,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-29 09:10:19,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:10:19,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:10:19,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:10:19,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:10:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:19,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:19,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:19,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:10:19,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:19,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:19,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:19,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113084204] [2020-10-29 09:10:19,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:19,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:10:19,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533046468] [2020-10-29 09:10:19,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:10:19,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:19,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:10:19,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:19,572 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-29 09:10:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:19,763 INFO L93 Difference]: Finished difference Result 93 states and 151 transitions. [2020-10-29 09:10:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:10:19,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-29 09:10:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:19,775 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:10:19,776 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:10:19,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:10:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:10:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:10:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:10:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-29 09:10:19,825 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 12 [2020-10-29 09:10:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:19,826 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-29 09:10:19,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:10:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-29 09:10:19,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:10:19,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:19,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:19,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:10:19,828 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash 734291246, now seen corresponding path program 1 times [2020-10-29 09:10:19,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:19,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823688134] [2020-10-29 09:10:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:19,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-29 09:10:19,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:19,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-29 09:10:19,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:19,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:19,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:10:19,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:20,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:20,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:20,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:10:20,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:20,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:20,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823688134] [2020-10-29 09:10:20,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:20,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:20,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244524123] [2020-10-29 09:10:20,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:20,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:20,052 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2020-10-29 09:10:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:20,237 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-29 09:10:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:20,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-29 09:10:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:20,239 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:10:20,239 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:10:20,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:10:20,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2020-10-29 09:10:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:10:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-29 09:10:20,250 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 13 [2020-10-29 09:10:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:20,250 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-29 09:10:20,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-29 09:10:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:10:20,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:20,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:20,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:10:20,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1364408435, now seen corresponding path program 1 times [2020-10-29 09:10:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:20,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333819197] [2020-10-29 09:10:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:10:20,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:20,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 444 [2020-10-29 09:10:20,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:20,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:20,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:10:20,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:20,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:20,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:20,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:10:20,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:20,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:20,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333819197] [2020-10-29 09:10:20,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:20,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:20,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783729689] [2020-10-29 09:10:20,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:20,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:20,870 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-29 09:10:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:21,129 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-29 09:10:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:21,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-29 09:10:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:21,131 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:10:21,131 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:10:21,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:10:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-29 09:10:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:10:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-29 09:10:21,142 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 18 [2020-10-29 09:10:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:21,143 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-29 09:10:21,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-29 09:10:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:10:21,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:21,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:21,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:10:21,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1400691951, now seen corresponding path program 1 times [2020-10-29 09:10:21,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:21,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145956917] [2020-10-29 09:10:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:10:21,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-29 09:10:21,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:21,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:10:21,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:21,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:21,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:21,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:21,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:21,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:21,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145956917] [2020-10-29 09:10:21,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:21,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:21,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210169016] [2020-10-29 09:10:21,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:21,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:21,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:21,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:21,376 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 6 states. [2020-10-29 09:10:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:21,620 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-29 09:10:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:21,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-29 09:10:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:21,622 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:10:21,622 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:10:21,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:10:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-29 09:10:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:10:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-29 09:10:21,632 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 18 [2020-10-29 09:10:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:21,633 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-29 09:10:21,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-29 09:10:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:10:21,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:21,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:21,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:10:21,635 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash -599195063, now seen corresponding path program 1 times [2020-10-29 09:10:21,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:21,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191275842] [2020-10-29 09:10:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:10:21,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-29 09:10:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:21,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:21,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:10:21,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:21,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:21,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:21,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:21,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191275842] [2020-10-29 09:10:21,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:21,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:10:21,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099308088] [2020-10-29 09:10:21,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:21,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:21,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:21,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:21,934 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2020-10-29 09:10:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:22,208 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-29 09:10:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:22,209 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-29 09:10:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:22,210 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:10:22,210 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:10:22,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:10:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-29 09:10:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:10:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-29 09:10:22,219 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 22 [2020-10-29 09:10:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:22,219 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-29 09:10:22,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-29 09:10:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:10:22,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:22,220 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] [2020-10-29 09:10:22,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:10:22,221 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:22,222 INFO L82 PathProgramCache]: Analyzing trace with hash -793138916, now seen corresponding path program 1 times [2020-10-29 09:10:22,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:22,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69044472] [2020-10-29 09:10:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:22,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:10:22,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:22,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-29 09:10:22,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:22,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:22,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:22,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:22,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:10:22,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:22,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:22,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:22,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:22,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:22,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:22,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:22,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:23,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:23,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:23,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:23,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69044472] [2020-10-29 09:10:23,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:23,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:10:23,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847637825] [2020-10-29 09:10:23,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:23,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:23,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:23,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:23,011 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2020-10-29 09:10:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:23,405 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-29 09:10:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:23,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-29 09:10:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:23,407 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:10:23,407 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:10:23,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:10:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-29 09:10:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:10:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-29 09:10:23,416 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 22 [2020-10-29 09:10:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:23,416 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-29 09:10:23,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-29 09:10:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:10:23,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:23,417 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] [2020-10-29 09:10:23,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:10:23,418 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash -756855400, now seen corresponding path program 1 times [2020-10-29 09:10:23,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:23,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511129029] [2020-10-29 09:10:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:23,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:10:23,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:23,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 09:10:23,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:23,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:23,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:23,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:23,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:23,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:23,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:23,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:23,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:23,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:23,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:23,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:23,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:23,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:23,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511129029] [2020-10-29 09:10:23,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:23,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:10:23,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191701604] [2020-10-29 09:10:23,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:23,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:23,814 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 7 states. [2020-10-29 09:10:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:24,224 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-29 09:10:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:24,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-29 09:10:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:24,226 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:10:24,226 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:10:24,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:10:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-29 09:10:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:10:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-29 09:10:24,234 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-10-29 09:10:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:24,235 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-29 09:10:24,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-29 09:10:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:10:24,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:24,236 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, 1, 1, 1, 1, 1] [2020-10-29 09:10:24,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:10:24,236 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:24,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1374761764, now seen corresponding path program 1 times [2020-10-29 09:10:24,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:24,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271977502] [2020-10-29 09:10:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:24,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:25,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:10:25,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:25,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-29 09:10:25,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:25,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:25,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:25,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:25,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:10:25,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:25,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:25,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:25,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:25,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:25,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:25,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:25,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:25,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:25,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271977502] [2020-10-29 09:10:25,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:25,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:10:25,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115048974] [2020-10-29 09:10:25,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:25,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:25,494 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 7 states. [2020-10-29 09:10:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:25,782 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-29 09:10:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:25,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-29 09:10:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:25,783 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:10:25,783 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:10:25,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:10:25,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-10-29 09:10:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:10:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-29 09:10:25,792 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 28 [2020-10-29 09:10:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:25,792 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-29 09:10:25,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-29 09:10:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:10:25,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:25,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:25,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:10:25,794 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:25,794 INFO L82 PathProgramCache]: Analyzing trace with hash 602225323, now seen corresponding path program 1 times [2020-10-29 09:10:25,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:25,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604927520] [2020-10-29 09:10:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:25,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:26,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:10:26,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:26,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-29 09:10:26,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:26,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:10:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:26,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:26,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:26,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:26,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:26,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:26,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:26,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:26,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:26,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:26,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:26,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604927520] [2020-10-29 09:10:26,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:26,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:26,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113575574] [2020-10-29 09:10:26,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:26,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:26,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:26,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:26,466 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 8 states. [2020-10-29 09:10:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:26,907 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-10-29 09:10:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:26,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-29 09:10:26,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:26,909 INFO L225 Difference]: With dead ends: 87 [2020-10-29 09:10:26,909 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:10:26,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:10:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-29 09:10:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:10:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-10-29 09:10:26,927 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 28 [2020-10-29 09:10:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:26,928 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-10-29 09:10:26,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-10-29 09:10:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:10:26,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:26,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:26,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:10:26,936 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:26,936 INFO L82 PathProgramCache]: Analyzing trace with hash 638508839, now seen corresponding path program 1 times [2020-10-29 09:10:26,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:26,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250354085] [2020-10-29 09:10:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:27,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:10:27,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:27,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-29 09:10:27,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:27,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:10:27,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:27,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:27,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:27,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:27,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250354085] [2020-10-29 09:10:27,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:27,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:27,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829938134] [2020-10-29 09:10:27,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:27,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:27,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:27,423 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 8 states. [2020-10-29 09:10:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:27,872 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-10-29 09:10:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:27,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-29 09:10:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:27,874 INFO L225 Difference]: With dead ends: 103 [2020-10-29 09:10:27,874 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:10:27,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:10:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-10-29 09:10:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-29 09:10:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-10-29 09:10:27,883 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 28 [2020-10-29 09:10:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:27,883 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-10-29 09:10:27,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-10-29 09:10:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:27,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:27,885 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:27,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:10:27,885 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash -617083753, now seen corresponding path program 1 times [2020-10-29 09:10:27,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:27,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573606768] [2020-10-29 09:10:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:27,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:31,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:31,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:10:31,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3485 [2020-10-29 09:10:31,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:31,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:10:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:31,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:10:31,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:31,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:31,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:31,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:31,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:31,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:31,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:31,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:31,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:31,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573606768] [2020-10-29 09:10:31,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:31,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:10:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075901411] [2020-10-29 09:10:31,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:10:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:10:31,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:10:31,542 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 7 states. [2020-10-29 09:10:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:31,917 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-29 09:10:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:31,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-29 09:10:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:31,919 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:10:31,919 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:10:31,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:10:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:10:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:10:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-29 09:10:31,929 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 30 [2020-10-29 09:10:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:31,929 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-29 09:10:31,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:10:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-29 09:10:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:10:31,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:31,934 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:31,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:10:31,934 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash 891234433, now seen corresponding path program 1 times [2020-10-29 09:10:31,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:31,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865001418] [2020-10-29 09:10:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:10:32,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:32,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-29 09:10:32,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:32,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:32,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:10:32,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:32,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:32,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:32,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:32,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:32,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:32,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:32,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:32,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:32,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865001418] [2020-10-29 09:10:32,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:32,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:32,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139148278] [2020-10-29 09:10:32,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:32,446 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 9 states. [2020-10-29 09:10:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:32,835 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-10-29 09:10:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:32,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-29 09:10:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:32,837 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:10:32,837 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:10:32,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:10:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-29 09:10:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:10:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-29 09:10:32,846 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 32 [2020-10-29 09:10:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:32,847 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-29 09:10:32,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-29 09:10:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:10:32,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:32,848 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:32,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:10:32,849 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:32,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1962519572, now seen corresponding path program 2 times [2020-10-29 09:10:32,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:32,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683547527] [2020-10-29 09:10:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:32,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:10:33,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-10-29 09:10:33,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:33,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:33,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:10:33,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:34,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:34,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:34,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:34,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:34,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:34,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:34,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:34,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:34,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:34,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683547527] [2020-10-29 09:10:34,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:34,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:34,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301667992] [2020-10-29 09:10:34,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:34,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:34,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:34,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:34,238 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 9 states. [2020-10-29 09:10:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:34,952 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-10-29 09:10:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:34,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-29 09:10:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:34,954 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:10:34,954 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:10:34,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:10:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-10-29 09:10:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:10:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-29 09:10:34,967 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 32 [2020-10-29 09:10:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:34,970 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-29 09:10:34,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-29 09:10:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:10:34,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:34,971 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] [2020-10-29 09:10:34,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:10:34,972 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:34,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1998803088, now seen corresponding path program 2 times [2020-10-29 09:10:34,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:34,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123827292] [2020-10-29 09:10:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:10:35,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-29 09:10:35,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:10:35,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:35,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:35,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:35,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:35,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:35,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:35,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123827292] [2020-10-29 09:10:35,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:35,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:35,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14883432] [2020-10-29 09:10:35,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:35,650 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 9 states. [2020-10-29 09:10:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:36,283 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-10-29 09:10:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:36,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-29 09:10:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:36,286 INFO L225 Difference]: With dead ends: 77 [2020-10-29 09:10:36,286 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:10:36,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:10:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-29 09:10:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:10:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-29 09:10:36,304 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 32 [2020-10-29 09:10:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:36,304 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-29 09:10:36,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-29 09:10:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:10:36,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:36,306 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:36,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:10:36,307 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1301113108, now seen corresponding path program 1 times [2020-10-29 09:10:36,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:36,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476886874] [2020-10-29 09:10:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:39,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:10:39,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:39,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3270 [2020-10-29 09:10:39,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:39,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:39,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:10:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:10:39,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:39,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:39,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:39,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:39,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:39,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:39,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:10:39,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476886874] [2020-10-29 09:10:39,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:39,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:39,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902852325] [2020-10-29 09:10:39,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:39,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:39,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:39,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:39,719 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 8 states. [2020-10-29 09:10:40,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:40,041 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-29 09:10:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:40,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-29 09:10:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:40,043 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:10:40,043 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:10:40,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:10:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-10-29 09:10:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:10:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-29 09:10:40,057 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 38 [2020-10-29 09:10:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:40,057 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-29 09:10:40,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-29 09:10:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:10:40,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:40,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:40,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:10:40,058 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:40,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1549458525, now seen corresponding path program 3 times [2020-10-29 09:10:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:40,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196248970] [2020-10-29 09:10:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:40,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:10:41,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:41,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-10-29 09:10:41,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:41,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:10:41,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:41,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:41,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:41,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:41,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:41,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:41,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196248970] [2020-10-29 09:10:41,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:41,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:41,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000143048] [2020-10-29 09:10:41,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:41,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:41,366 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 10 states. [2020-10-29 09:10:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:42,003 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2020-10-29 09:10:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:42,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-29 09:10:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:42,004 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:10:42,004 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:10:42,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:10:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2020-10-29 09:10:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-10-29 09:10:42,013 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 38 [2020-10-29 09:10:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:42,014 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-10-29 09:10:42,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-10-29 09:10:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:10:42,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:42,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:42,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:10:42,015 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:42,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1513175009, now seen corresponding path program 3 times [2020-10-29 09:10:42,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:42,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289936702] [2020-10-29 09:10:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:42,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:42,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:10:42,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:42,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-29 09:10:42,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:42,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:10:42,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:42,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:42,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:42,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:42,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:42,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:42,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:42,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:42,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:42,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289936702] [2020-10-29 09:10:42,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:42,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:42,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202782944] [2020-10-29 09:10:42,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:42,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:42,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:42,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:42,767 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 10 states. [2020-10-29 09:10:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:43,491 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2020-10-29 09:10:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:43,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-29 09:10:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:43,494 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:10:43,494 INFO L226 Difference]: Without dead ends: 98 [2020-10-29 09:10:43,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-29 09:10:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-29 09:10:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-10-29 09:10:43,513 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 38 [2020-10-29 09:10:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:43,513 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-10-29 09:10:43,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-10-29 09:10:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:10:43,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:43,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:43,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:10:43,514 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:43,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1786742065, now seen corresponding path program 1 times [2020-10-29 09:10:43,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:43,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182551616] [2020-10-29 09:10:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:43,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:47,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:10:47,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:47,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3509 [2020-10-29 09:10:47,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:47,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:47,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:10:47,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:47,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:47,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:47,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:47,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:47,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:47,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:47,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:47,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:47,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:47,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:10:47,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182551616] [2020-10-29 09:10:47,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:47,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:47,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111500802] [2020-10-29 09:10:47,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:47,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:47,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:47,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:47,266 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 9 states. [2020-10-29 09:10:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:47,782 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-10-29 09:10:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:47,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-29 09:10:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:47,783 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:10:47,783 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 09:10:47,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 09:10:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-29 09:10:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 09:10:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-29 09:10:47,793 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 40 [2020-10-29 09:10:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:47,793 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-29 09:10:47,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-29 09:10:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:10:47,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:47,794 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:47,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:10:47,794 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1393161782, now seen corresponding path program 2 times [2020-10-29 09:10:47,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:47,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407719809] [2020-10-29 09:10:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:47,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:48,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:48,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:52,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:10:52,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:10:52,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:10:52,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:52,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:52,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:52,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:52,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:10:52,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:53,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:53,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:53,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:53,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:53,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:53,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:53,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:53,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:53,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:10:53,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407719809] [2020-10-29 09:10:53,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:53,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225458607] [2020-10-29 09:10:53,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:53,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:53,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:53,049 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 9 states. [2020-10-29 09:10:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:53,523 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-10-29 09:10:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:53,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-29 09:10:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:53,524 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:10:53,524 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:10:53,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:10:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-29 09:10:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:10:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-29 09:10:53,533 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 42 [2020-10-29 09:10:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:53,533 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-29 09:10:53,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-29 09:10:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:10:53,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:53,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:53,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:10:53,534 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:53,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1873685127, now seen corresponding path program 2 times [2020-10-29 09:10:53,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:53,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447839117] [2020-10-29 09:10:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:53,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:54,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:10:54,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-29 09:10:54,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:54,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:10:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:54,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:54,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:54,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:54,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:54,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:54,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:54,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:54,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:54,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447839117] [2020-10-29 09:10:54,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:54,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:54,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816793929] [2020-10-29 09:10:54,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:54,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:54,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:54,324 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 11 states. [2020-10-29 09:10:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:54,887 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-10-29 09:10:54,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:54,887 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-29 09:10:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:54,889 INFO L225 Difference]: With dead ends: 89 [2020-10-29 09:10:54,889 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:10:54,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:10:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-29 09:10:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:10:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-29 09:10:54,898 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 42 [2020-10-29 09:10:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:54,898 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-29 09:10:54,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-29 09:10:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:10:54,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:54,899 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:54,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:10:54,899 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:54,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1334991412, now seen corresponding path program 4 times [2020-10-29 09:10:54,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:54,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636061829] [2020-10-29 09:10:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:54,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:55,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:56,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:56,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:10:56,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:56,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1149 [2020-10-29 09:10:56,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:56,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:10:56,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:56,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:56,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:56,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:56,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:56,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:56,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:56,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:56,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:56,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:56,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:56,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636061829] [2020-10-29 09:10:56,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:56,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:56,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121956135] [2020-10-29 09:10:56,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:56,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:56,355 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 11 states. [2020-10-29 09:10:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:57,191 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2020-10-29 09:10:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:57,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-29 09:10:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:57,194 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:10:57,195 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:10:57,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:10:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2020-10-29 09:10:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 09:10:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-29 09:10:57,211 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 42 [2020-10-29 09:10:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:57,212 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-29 09:10:57,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-29 09:10:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:10:57,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:57,212 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:57,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:10:57,213 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1298707896, now seen corresponding path program 4 times [2020-10-29 09:10:57,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:57,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591346322] [2020-10-29 09:10:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:57,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:57,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:57,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:10:57,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:57,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-29 09:10:57,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:57,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:10:57,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:58,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:58,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:58,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:58,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:58,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:58,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:58,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:58,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:58,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:58,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591346322] [2020-10-29 09:10:58,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:58,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:58,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913558562] [2020-10-29 09:10:58,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:58,264 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 11 states. [2020-10-29 09:10:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:59,217 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2020-10-29 09:10:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:10:59,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-29 09:10:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:59,218 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:10:59,218 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:10:59,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:10:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-29 09:10:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:10:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-29 09:10:59,227 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 42 [2020-10-29 09:10:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:59,227 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-29 09:10:59,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-29 09:10:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:10:59,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:59,228 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:59,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:10:59,229 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash 838136667, now seen corresponding path program 5 times [2020-10-29 09:10:59,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:59,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087300837] [2020-10-29 09:10:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:59,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:59,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:00,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:00,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:11:00,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:00,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1422 [2020-10-29 09:11:00,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:00,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:00,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:00,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:00,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:11:00,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:01,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:01,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:01,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:01,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:01,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:01,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:01,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:01,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:01,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:01,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087300837] [2020-10-29 09:11:01,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:01,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510024799] [2020-10-29 09:11:01,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:01,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:01,113 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 12 states. [2020-10-29 09:11:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:01,965 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2020-10-29 09:11:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:01,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 09:11:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:01,967 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:11:01,967 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:11:01,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:11:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2020-10-29 09:11:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 09:11:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2020-10-29 09:11:01,995 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 48 [2020-10-29 09:11:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:01,995 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2020-10-29 09:11:01,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2020-10-29 09:11:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:11:01,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:01,996 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:01,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:11:01,996 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:01,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:01,997 INFO L82 PathProgramCache]: Analyzing trace with hash 874420183, now seen corresponding path program 5 times [2020-10-29 09:11:01,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:01,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851199996] [2020-10-29 09:11:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:02,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:02,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:02,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:11:02,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:02,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-10-29 09:11:02,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:02,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:11:02,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:03,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:03,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:03,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:03,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:03,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:03,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:03,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:03,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:03,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:03,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:03,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851199996] [2020-10-29 09:11:03,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:03,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:03,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007548430] [2020-10-29 09:11:03,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:03,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:03,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:03,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:03,028 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand 12 states. [2020-10-29 09:11:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:03,891 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-29 09:11:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:03,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 09:11:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:03,893 INFO L225 Difference]: With dead ends: 147 [2020-10-29 09:11:03,893 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:11:03,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:11:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-29 09:11:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 09:11:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2020-10-29 09:11:03,904 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 48 [2020-10-29 09:11:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:03,904 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2020-10-29 09:11:03,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2020-10-29 09:11:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:11:03,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:03,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:03,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:11:03,906 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash 999468999, now seen corresponding path program 3 times [2020-10-29 09:11:03,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:03,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994166319] [2020-10-29 09:11:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:03,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:03,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:08,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:11:08,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:09,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:09,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:09,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:09,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:09,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:09,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:09,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:09,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:09,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:09,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:09,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 09:11:09,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994166319] [2020-10-29 09:11:09,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:09,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:09,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034010475] [2020-10-29 09:11:09,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:09,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:09,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:09,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:09,077 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand 10 states. [2020-10-29 09:11:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:09,634 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2020-10-29 09:11:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:09,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-29 09:11:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:09,636 INFO L225 Difference]: With dead ends: 126 [2020-10-29 09:11:09,636 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:11:09,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:11:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-29 09:11:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-29 09:11:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2020-10-29 09:11:09,648 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 50 [2020-10-29 09:11:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:09,648 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2020-10-29 09:11:09,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2020-10-29 09:11:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:11:09,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:09,649 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:09,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:11:09,650 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash 391045314, now seen corresponding path program 4 times [2020-10-29 09:11:09,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:09,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034491328] [2020-10-29 09:11:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:11:13,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:11:13,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3847 [2020-10-29 09:11:13,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:13,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:11:13,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:13,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:13,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:13,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:13,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 09:11:13,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034491328] [2020-10-29 09:11:13,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:13,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:13,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651494102] [2020-10-29 09:11:13,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:13,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:13,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:13,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:13,739 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand 11 states. [2020-10-29 09:11:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:14,463 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2020-10-29 09:11:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:14,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-29 09:11:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:14,465 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:11:14,465 INFO L226 Difference]: Without dead ends: 128 [2020-10-29 09:11:14,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:11:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-29 09:11:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2020-10-29 09:11:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:11:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-10-29 09:11:14,481 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 52 [2020-10-29 09:11:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:14,482 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-10-29 09:11:14,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-10-29 09:11:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:11:14,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:14,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:14,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:11:14,483 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:14,484 INFO L82 PathProgramCache]: Analyzing trace with hash -834467535, now seen corresponding path program 3 times [2020-10-29 09:11:14,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:14,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176968964] [2020-10-29 09:11:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:14,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:15,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:11:15,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:15,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:15,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:15,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:15,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:15,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:15,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 09:11:15,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:15,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:15,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:15,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:15,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:15,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:15,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176968964] [2020-10-29 09:11:15,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:15,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:15,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162420971] [2020-10-29 09:11:15,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:15,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:15,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:15,765 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 13 states. [2020-10-29 09:11:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:16,741 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2020-10-29 09:11:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:16,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-29 09:11:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:16,743 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:11:16,743 INFO L226 Difference]: Without dead ends: 130 [2020-10-29 09:11:16,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:11:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-29 09:11:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-29 09:11:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 09:11:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2020-10-29 09:11:16,763 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 52 [2020-10-29 09:11:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:16,764 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2020-10-29 09:11:16,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2020-10-29 09:11:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:11:16,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:16,765 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:16,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:11:16,765 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -534538684, now seen corresponding path program 6 times [2020-10-29 09:11:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:16,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160810685] [2020-10-29 09:11:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:16,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:18,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1771 [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:11:18,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:19,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:19,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:19,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:19,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:19,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:19,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:19,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:19,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:19,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160810685] [2020-10-29 09:11:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648523449] [2020-10-29 09:11:19,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:19,165 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand 13 states. [2020-10-29 09:11:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:20,542 INFO L93 Difference]: Finished difference Result 182 states and 194 transitions. [2020-10-29 09:11:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:11:20,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-29 09:11:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:20,544 INFO L225 Difference]: With dead ends: 182 [2020-10-29 09:11:20,544 INFO L226 Difference]: Without dead ends: 160 [2020-10-29 09:11:20,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-29 09:11:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-10-29 09:11:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-29 09:11:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2020-10-29 09:11:20,558 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 52 [2020-10-29 09:11:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:20,558 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2020-10-29 09:11:20,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2020-10-29 09:11:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:11:20,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:20,559 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:20,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:11:20,560 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash -498255168, now seen corresponding path program 6 times [2020-10-29 09:11:20,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:20,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227694360] [2020-10-29 09:11:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:20,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:21,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:11:21,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:21,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-29 09:11:21,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:21,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:21,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:21,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:21,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:11:21,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:22,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:22,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:22,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:22,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:22,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:22,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:22,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:22,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:22,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:22,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:22,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:22,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227694360] [2020-10-29 09:11:22,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:22,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:22,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17275068] [2020-10-29 09:11:22,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:22,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:22,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:22,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:22,081 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand 13 states. [2020-10-29 09:11:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:23,620 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2020-10-29 09:11:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:23,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-29 09:11:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:23,623 INFO L225 Difference]: With dead ends: 172 [2020-10-29 09:11:23,623 INFO L226 Difference]: Without dead ends: 168 [2020-10-29 09:11:23,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-29 09:11:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2020-10-29 09:11:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-29 09:11:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 170 transitions. [2020-10-29 09:11:23,642 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 170 transitions. Word has length 52 [2020-10-29 09:11:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:23,642 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 170 transitions. [2020-10-29 09:11:23,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 170 transitions. [2020-10-29 09:11:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:11:23,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:23,646 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:23,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:11:23,646 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash -188563715, now seen corresponding path program 5 times [2020-10-29 09:11:23,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:23,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435467023] [2020-10-29 09:11:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:23,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:28,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:28,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:11:28,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:11:28,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 09:11:28,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:28,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:28,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:28,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:28,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:11:28,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:28,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:28,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:28,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:28,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:28,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:28,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:28,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:28,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:28,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:28,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:28,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:28,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 09:11:28,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435467023] [2020-10-29 09:11:28,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:28,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:28,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450713978] [2020-10-29 09:11:28,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:28,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:28,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:28,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:28,972 INFO L87 Difference]: Start difference. First operand 161 states and 170 transitions. Second operand 11 states. [2020-10-29 09:11:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:29,623 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2020-10-29 09:11:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:29,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-29 09:11:29,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:29,625 INFO L225 Difference]: With dead ends: 173 [2020-10-29 09:11:29,625 INFO L226 Difference]: Without dead ends: 134 [2020-10-29 09:11:29,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-29 09:11:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-10-29 09:11:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-29 09:11:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2020-10-29 09:11:29,637 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 54 [2020-10-29 09:11:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:29,637 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2020-10-29 09:11:29,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2020-10-29 09:11:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:11:29,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:29,638 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:29,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:11:29,638 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1090216787, now seen corresponding path program 7 times [2020-10-29 09:11:29,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:29,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442005455] [2020-10-29 09:11:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:29,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:30,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:31,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:31,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:11:31,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2034 [2020-10-29 09:11:31,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:31,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:11:31,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:32,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:32,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:32,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:32,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:32,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:32,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:32,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:32,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:32,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:32,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:32,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:32,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:32,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442005455] [2020-10-29 09:11:32,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:32,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:32,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103817126] [2020-10-29 09:11:32,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:32,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:32,377 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand 14 states. [2020-10-29 09:11:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:33,790 INFO L93 Difference]: Finished difference Result 158 states and 168 transitions. [2020-10-29 09:11:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:33,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-29 09:11:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:33,792 INFO L225 Difference]: With dead ends: 158 [2020-10-29 09:11:33,792 INFO L226 Difference]: Without dead ends: 136 [2020-10-29 09:11:33,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-29 09:11:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 107. [2020-10-29 09:11:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:11:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2020-10-29 09:11:33,803 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 56 [2020-10-29 09:11:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:33,803 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2020-10-29 09:11:33,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2020-10-29 09:11:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:11:33,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:33,804 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:33,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:11:33,804 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1453151789, now seen corresponding path program 8 times [2020-10-29 09:11:33,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:33,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652090841] [2020-10-29 09:11:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:33,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:34,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:35,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:11:35,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:35,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-29 09:11:35,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:35,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:35,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:35,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:35,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:11:35,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:35,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:35,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:35,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:35,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:35,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:35,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:35,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:35,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:35,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:35,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:35,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:35,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652090841] [2020-10-29 09:11:35,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:35,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:35,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038619148] [2020-10-29 09:11:35,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:35,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:35,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:35,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:35,660 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand 14 states. [2020-10-29 09:11:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:36,940 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2020-10-29 09:11:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:36,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-29 09:11:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:36,941 INFO L225 Difference]: With dead ends: 153 [2020-10-29 09:11:36,941 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 09:11:36,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 09:11:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2020-10-29 09:11:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-29 09:11:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2020-10-29 09:11:36,955 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 58 [2020-10-29 09:11:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:36,955 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2020-10-29 09:11:36,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:36,955 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2020-10-29 09:11:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:11:36,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:36,956 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:36,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:11:36,957 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:36,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1416868273, now seen corresponding path program 7 times [2020-10-29 09:11:36,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:36,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259840186] [2020-10-29 09:11:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:38,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:38,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:11:38,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:38,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-29 09:11:38,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:38,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:38,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:38,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:11:38,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:38,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:38,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:38,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:38,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:38,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:38,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:38,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:38,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:38,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:38,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:38,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:38,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:38,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259840186] [2020-10-29 09:11:38,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:38,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:38,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439783057] [2020-10-29 09:11:38,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:38,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:38,691 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand 14 states. [2020-10-29 09:11:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:39,924 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2020-10-29 09:11:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:11:39,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-29 09:11:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:39,927 INFO L225 Difference]: With dead ends: 173 [2020-10-29 09:11:39,927 INFO L226 Difference]: Without dead ends: 144 [2020-10-29 09:11:39,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:11:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-29 09:11:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-29 09:11:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-29 09:11:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2020-10-29 09:11:39,941 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 58 [2020-10-29 09:11:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:39,941 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2020-10-29 09:11:39,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2020-10-29 09:11:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:11:39,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:39,942 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:39,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:11:39,942 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:39,943 INFO L82 PathProgramCache]: Analyzing trace with hash -268644742, now seen corresponding path program 6 times [2020-10-29 09:11:39,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:39,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853058876] [2020-10-29 09:11:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:39,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:40,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:40,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:11:44,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:45,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:45,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-29 09:11:45,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853058876] [2020-10-29 09:11:45,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:45,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:45,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151036176] [2020-10-29 09:11:45,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:45,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:45,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:45,249 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 12 states. [2020-10-29 09:11:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:46,085 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2020-10-29 09:11:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:46,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-29 09:11:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:46,087 INFO L225 Difference]: With dead ends: 150 [2020-10-29 09:11:46,087 INFO L226 Difference]: Without dead ends: 144 [2020-10-29 09:11:46,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-29 09:11:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-29 09:11:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-29 09:11:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2020-10-29 09:11:46,101 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 62 [2020-10-29 09:11:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:46,101 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2020-10-29 09:11:46,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2020-10-29 09:11:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:11:46,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:46,102 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:46,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:11:46,102 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:46,103 INFO L82 PathProgramCache]: Analyzing trace with hash -763313239, now seen corresponding path program 4 times [2020-10-29 09:11:46,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:46,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066810184] [2020-10-29 09:11:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:46,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:47,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:11:47,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:47,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1480 [2020-10-29 09:11:47,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:47,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:47,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:47,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:47,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:11:47,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:48,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:48,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:48,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:48,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:48,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:48,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:48,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:48,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:48,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:48,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066810184] [2020-10-29 09:11:48,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:48,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:11:48,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588087751] [2020-10-29 09:11:48,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:11:48,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:11:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:48,196 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand 15 states. [2020-10-29 09:11:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:49,454 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2020-10-29 09:11:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:11:49,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-10-29 09:11:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:49,456 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:11:49,457 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:11:49,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:11:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:11:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-29 09:11:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 09:11:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2020-10-29 09:11:49,471 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 62 [2020-10-29 09:11:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:49,472 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2020-10-29 09:11:49,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:11:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2020-10-29 09:11:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:11:49,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:49,473 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:49,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:11:49,473 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash 861240700, now seen corresponding path program 9 times [2020-10-29 09:11:49,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:49,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913323724] [2020-10-29 09:11:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:51,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:11:51,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:51,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2261 [2020-10-29 09:11:51,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:51,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:11:51,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,318 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-29 09:11:52,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:52,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:52,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:52,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:52,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:52,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:52,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:52,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:52,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:52,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:52,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913323724] [2020-10-29 09:11:52,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:52,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:11:52,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387274511] [2020-10-29 09:11:52,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:11:52,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:52,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:11:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:52,662 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand 15 states. [2020-10-29 09:11:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:54,537 INFO L93 Difference]: Finished difference Result 212 states and 224 transitions. [2020-10-29 09:11:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:11:54,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-10-29 09:11:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:54,539 INFO L225 Difference]: With dead ends: 212 [2020-10-29 09:11:54,539 INFO L226 Difference]: Without dead ends: 188 [2020-10-29 09:11:54,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:11:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-29 09:11:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2020-10-29 09:11:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-29 09:11:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2020-10-29 09:11:54,553 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 62 [2020-10-29 09:11:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:54,553 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2020-10-29 09:11:54,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:11:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2020-10-29 09:11:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:11:54,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:54,557 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:54,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:11:54,557 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash 897524216, now seen corresponding path program 8 times [2020-10-29 09:11:54,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:54,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078732952] [2020-10-29 09:11:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:54,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:56,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:56,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:11:56,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:56,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-29 09:11:56,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:56,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:56,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:56,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:56,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:11:56,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:56,453 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-29 09:11:56,639 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-29 09:11:56,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:56,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:56,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:56,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:56,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:56,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:56,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:56,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:56,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:56,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078732952] [2020-10-29 09:11:56,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:56,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:11:56,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38483641] [2020-10-29 09:11:56,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:11:56,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:56,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:11:56,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:56,880 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand 15 states. [2020-10-29 09:11:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:58,758 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2020-10-29 09:11:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:11:58,759 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-10-29 09:11:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:58,761 INFO L225 Difference]: With dead ends: 172 [2020-10-29 09:11:58,761 INFO L226 Difference]: Without dead ends: 168 [2020-10-29 09:11:58,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:11:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-29 09:11:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2020-10-29 09:11:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-29 09:11:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 170 transitions. [2020-10-29 09:11:58,776 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 170 transitions. Word has length 62 [2020-10-29 09:11:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:58,776 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 170 transitions. [2020-10-29 09:11:58,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:11:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 170 transitions. [2020-10-29 09:11:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:11:58,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:58,777 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:58,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:11:58,778 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1504452277, now seen corresponding path program 7 times [2020-10-29 09:11:58,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:58,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768712362] [2020-10-29 09:11:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:58,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:58,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:03,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:12:03,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:12:03,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:12:03,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:03,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:03,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:03,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:03,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:12:03,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:04,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:04,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-29 09:12:04,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768712362] [2020-10-29 09:12:04,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:04,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:04,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788243897] [2020-10-29 09:12:04,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:04,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:04,202 INFO L87 Difference]: Start difference. First operand 161 states and 170 transitions. Second operand 13 states. [2020-10-29 09:12:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:05,100 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2020-10-29 09:12:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:05,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2020-10-29 09:12:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:05,103 INFO L225 Difference]: With dead ends: 203 [2020-10-29 09:12:05,103 INFO L226 Difference]: Without dead ends: 197 [2020-10-29 09:12:05,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-29 09:12:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 191. [2020-10-29 09:12:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-29 09:12:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 200 transitions. [2020-10-29 09:12:05,119 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 200 transitions. Word has length 64 [2020-10-29 09:12:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:05,119 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 200 transitions. [2020-10-29 09:12:05,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 200 transitions. [2020-10-29 09:12:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:12:05,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:05,121 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:05,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:12:05,121 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:05,121 INFO L82 PathProgramCache]: Analyzing trace with hash 348671024, now seen corresponding path program 8 times [2020-10-29 09:12:05,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:05,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509070651] [2020-10-29 09:12:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:05,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:05,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:05,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:10,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:10,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:12:10,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:12:10,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:12:10,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:10,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:12:10,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:10,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:10,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-29 09:12:10,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509070651] [2020-10-29 09:12:10,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:10,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:10,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16764278] [2020-10-29 09:12:10,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:10,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:10,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:10,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:10,608 INFO L87 Difference]: Start difference. First operand 191 states and 200 transitions. Second operand 13 states. [2020-10-29 09:12:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:11,569 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2020-10-29 09:12:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:11,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-29 09:12:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:11,571 INFO L225 Difference]: With dead ends: 205 [2020-10-29 09:12:11,571 INFO L226 Difference]: Without dead ends: 158 [2020-10-29 09:12:11,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-29 09:12:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-29 09:12:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-29 09:12:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 166 transitions. [2020-10-29 09:12:11,587 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 166 transitions. Word has length 66 [2020-10-29 09:12:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:11,587 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 166 transitions. [2020-10-29 09:12:11,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 166 transitions. [2020-10-29 09:12:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:12:11,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:11,588 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:11,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:12:11,588 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash 452220069, now seen corresponding path program 10 times [2020-10-29 09:12:11,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:11,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009073676] [2020-10-29 09:12:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:11,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3020 [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:12:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:15,080 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 09:12:15,223 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-29 09:12:15,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:15,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:15,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:15,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:15,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:15,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:15,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:15,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:15,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:15,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009073676] [2020-10-29 09:12:15,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:15,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:15,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163811031] [2020-10-29 09:12:15,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:15,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:15,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:15,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:15,513 INFO L87 Difference]: Start difference. First operand 158 states and 166 transitions. Second operand 16 states. [2020-10-29 09:12:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:17,226 INFO L93 Difference]: Finished difference Result 184 states and 194 transitions. [2020-10-29 09:12:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:17,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-29 09:12:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:17,228 INFO L225 Difference]: With dead ends: 184 [2020-10-29 09:12:17,228 INFO L226 Difference]: Without dead ends: 160 [2020-10-29 09:12:17,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-29 09:12:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2020-10-29 09:12:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 09:12:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2020-10-29 09:12:17,237 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 66 [2020-10-29 09:12:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:17,238 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2020-10-29 09:12:17,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2020-10-29 09:12:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:12:17,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:17,239 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:17,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:12:17,239 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:17,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:17,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1705527051, now seen corresponding path program 11 times [2020-10-29 09:12:17,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:17,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609345067] [2020-10-29 09:12:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:17,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:17,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:19,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2310 [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:12:19,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:19,890 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 09:12:20,055 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-29 09:12:20,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:20,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:20,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:20,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609345067] [2020-10-29 09:12:20,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:20,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:20,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480252130] [2020-10-29 09:12:20,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:20,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:20,370 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand 16 states. [2020-10-29 09:12:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:21,924 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-10-29 09:12:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:21,925 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-29 09:12:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:21,927 INFO L225 Difference]: With dead ends: 177 [2020-10-29 09:12:21,927 INFO L226 Difference]: Without dead ends: 173 [2020-10-29 09:12:21,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-29 09:12:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2020-10-29 09:12:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 09:12:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 174 transitions. [2020-10-29 09:12:21,942 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 174 transitions. Word has length 68 [2020-10-29 09:12:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:21,942 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 174 transitions. [2020-10-29 09:12:21,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 174 transitions. [2020-10-29 09:12:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:12:21,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:21,943 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:21,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:12:21,944 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:21,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:21,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1741810567, now seen corresponding path program 9 times [2020-10-29 09:12:21,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:21,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924691075] [2020-10-29 09:12:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:22,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:23,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:23,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:12:23,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:23,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-29 09:12:23,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:23,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:23,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:23,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:23,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:12:23,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:23,846 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-29 09:12:24,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:24,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:24,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:24,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:24,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924691075] [2020-10-29 09:12:24,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:24,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:12:24,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041027374] [2020-10-29 09:12:24,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:12:24,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:12:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:24,255 INFO L87 Difference]: Start difference. First operand 166 states and 174 transitions. Second operand 16 states. [2020-10-29 09:12:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:25,811 INFO L93 Difference]: Finished difference Result 199 states and 211 transitions. [2020-10-29 09:12:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:12:25,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-29 09:12:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:25,813 INFO L225 Difference]: With dead ends: 199 [2020-10-29 09:12:25,813 INFO L226 Difference]: Without dead ends: 168 [2020-10-29 09:12:25,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-29 09:12:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-29 09:12:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 09:12:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 173 transitions. [2020-10-29 09:12:25,827 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 173 transitions. Word has length 68 [2020-10-29 09:12:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:25,828 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 173 transitions. [2020-10-29 09:12:25,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:12:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 173 transitions. [2020-10-29 09:12:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:12:25,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:25,829 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:25,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:12:25,829 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:25,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:25,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1950022431, now seen corresponding path program 5 times [2020-10-29 09:12:25,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:25,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938460170] [2020-10-29 09:12:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:25,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:27,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:27,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:12:27,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1860 [2020-10-29 09:12:27,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:27,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:12:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:12:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:28,275 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-29 09:12:28,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:28,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:28,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:28,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:28,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:28,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:28,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:28,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:28,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:28,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:28,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:28,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:28,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938460170] [2020-10-29 09:12:28,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:28,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:12:28,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666062642] [2020-10-29 09:12:28,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:12:28,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:28,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:12:28,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:28,663 INFO L87 Difference]: Start difference. First operand 166 states and 173 transitions. Second operand 17 states. [2020-10-29 09:12:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:30,310 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2020-10-29 09:12:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:12:30,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-29 09:12:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:30,312 INFO L225 Difference]: With dead ends: 176 [2020-10-29 09:12:30,312 INFO L226 Difference]: Without dead ends: 172 [2020-10-29 09:12:30,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-29 09:12:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2020-10-29 09:12:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:12:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 145 transitions. [2020-10-29 09:12:30,326 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 145 transitions. Word has length 72 [2020-10-29 09:12:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:30,327 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 145 transitions. [2020-10-29 09:12:30,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:12:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 145 transitions. [2020-10-29 09:12:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:12:30,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:30,328 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:30,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:12:30,328 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1936284532, now seen corresponding path program 12 times [2020-10-29 09:12:30,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:30,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314911136] [2020-10-29 09:12:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:30,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:30,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:33,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3363 [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 09:12:33,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:34,160 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-29 09:12:34,326 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-29 09:12:34,519 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-29 09:12:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:34,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:34,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:34,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:34,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:34,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:34,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:34,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:34,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:34,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:34,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:34,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:34,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314911136] [2020-10-29 09:12:34,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:34,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:12:34,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454439372] [2020-10-29 09:12:34,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:12:34,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:34,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:12:34,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:34,879 INFO L87 Difference]: Start difference. First operand 138 states and 145 transitions. Second operand 17 states. [2020-10-29 09:12:36,172 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-29 09:12:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:37,517 INFO L93 Difference]: Finished difference Result 205 states and 216 transitions. [2020-10-29 09:12:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:12:37,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-29 09:12:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:37,518 INFO L225 Difference]: With dead ends: 205 [2020-10-29 09:12:37,518 INFO L226 Difference]: Without dead ends: 181 [2020-10-29 09:12:37,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:12:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-29 09:12:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 142. [2020-10-29 09:12:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-29 09:12:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2020-10-29 09:12:37,532 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 72 [2020-10-29 09:12:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:37,532 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2020-10-29 09:12:37,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:12:37,533 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2020-10-29 09:12:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:12:37,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:37,534 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:37,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:12:37,534 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:37,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1972568048, now seen corresponding path program 10 times [2020-10-29 09:12:37,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:37,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997858632] [2020-10-29 09:12:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:37,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:40,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2513 [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:12:40,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:40,688 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:12:41,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:41,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:41,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:41,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:41,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997858632] [2020-10-29 09:12:41,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:41,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:12:41,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271009540] [2020-10-29 09:12:41,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:12:41,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:41,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:12:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:41,114 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 17 states. [2020-10-29 09:12:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:43,706 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2020-10-29 09:12:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:12:43,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-29 09:12:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:43,708 INFO L225 Difference]: With dead ends: 150 [2020-10-29 09:12:43,708 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 09:12:43,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 09:12:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-10-29 09:12:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-29 09:12:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2020-10-29 09:12:43,723 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 72 [2020-10-29 09:12:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:43,724 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2020-10-29 09:12:43,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:12:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2020-10-29 09:12:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 09:12:43,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:43,726 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:43,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:12:43,726 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash -359799507, now seen corresponding path program 9 times [2020-10-29 09:12:43,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:43,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743628088] [2020-10-29 09:12:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:43,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:48,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:48,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:12:48,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:12:48,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-29 09:12:48,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:48,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:48,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:48,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:12:48,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:49,172 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-29 09:12:49,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:49,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:49,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:49,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:49,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:49,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:49,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:49,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:49,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:49,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:49,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:49,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-29 09:12:49,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743628088] [2020-10-29 09:12:49,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:49,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:49,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666944518] [2020-10-29 09:12:49,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:49,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:49,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:49,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:49,393 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand 14 states. [2020-10-29 09:12:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:50,722 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2020-10-29 09:12:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:50,723 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-29 09:12:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:50,724 INFO L225 Difference]: With dead ends: 176 [2020-10-29 09:12:50,724 INFO L226 Difference]: Without dead ends: 170 [2020-10-29 09:12:50,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-29 09:12:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 146. [2020-10-29 09:12:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-29 09:12:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 153 transitions. [2020-10-29 09:12:50,736 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 153 transitions. Word has length 74 [2020-10-29 09:12:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:50,736 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 153 transitions. [2020-10-29 09:12:50,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 153 transitions. [2020-10-29 09:12:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 09:12:50,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:50,738 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:50,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:12:50,738 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:50,738 INFO L82 PathProgramCache]: Analyzing trace with hash -195930968, now seen corresponding path program 10 times [2020-10-29 09:12:50,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:50,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348766486] [2020-10-29 09:12:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:50,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:50,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:51,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:55,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 09:12:55,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:56,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:56,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:56,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:56,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:56,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:56,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:56,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:56,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-29 09:12:56,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348766486] [2020-10-29 09:12:56,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:56,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:56,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075762241] [2020-10-29 09:12:56,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:56,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:56,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:56,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:56,449 INFO L87 Difference]: Start difference. First operand 146 states and 153 transitions. Second operand 15 states. [2020-10-29 09:12:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:57,804 INFO L93 Difference]: Finished difference Result 196 states and 203 transitions. [2020-10-29 09:12:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:12:57,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-10-29 09:12:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:57,806 INFO L225 Difference]: With dead ends: 196 [2020-10-29 09:12:57,806 INFO L226 Difference]: Without dead ends: 190 [2020-10-29 09:12:57,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-29 09:12:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 182. [2020-10-29 09:12:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-29 09:12:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 189 transitions. [2020-10-29 09:12:57,821 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 189 transitions. Word has length 76 [2020-10-29 09:12:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:57,822 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 189 transitions. [2020-10-29 09:12:57,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 189 transitions. [2020-10-29 09:12:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:12:57,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:57,823 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:57,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:12:57,823 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:57,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1632054941, now seen corresponding path program 11 times [2020-10-29 09:12:57,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:57,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695638664] [2020-10-29 09:12:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:57,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:58,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:01,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:01,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:02,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:02,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:13:02,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:13:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:13:02,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:02,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:13:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:13:02,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:03,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:03,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:03,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-29 09:13:03,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695638664] [2020-10-29 09:13:03,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:03,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:03,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575742054] [2020-10-29 09:13:03,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:03,410 INFO L87 Difference]: Start difference. First operand 182 states and 189 transitions. Second operand 15 states. [2020-10-29 09:13:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:04,701 INFO L93 Difference]: Finished difference Result 198 states and 205 transitions. [2020-10-29 09:13:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:13:04,702 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-10-29 09:13:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:04,703 INFO L225 Difference]: With dead ends: 198 [2020-10-29 09:13:04,703 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:13:04,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:13:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:13:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-29 09:13:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-29 09:13:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 149 transitions. [2020-10-29 09:13:04,719 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 149 transitions. Word has length 78 [2020-10-29 09:13:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:04,720 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 149 transitions. [2020-10-29 09:13:04,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 149 transitions. [2020-10-29 09:13:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:13:04,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:04,721 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:04,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:13:04,721 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash 195808003, now seen corresponding path program 13 times [2020-10-29 09:13:04,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:04,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235718584] [2020-10-29 09:13:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:04,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:05,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:08,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:08,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:13:08,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:08,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3662 [2020-10-29 09:13:08,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:08,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:08,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:13:08,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 09:13:08,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:09,027 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-29 09:13:09,229 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-29 09:13:09,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:09,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:09,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:09,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:09,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:09,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:09,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:09,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:09,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:09,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:09,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:09,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:09,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235718584] [2020-10-29 09:13:09,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:09,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:13:09,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685650523] [2020-10-29 09:13:09,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:13:09,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:09,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:13:09,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:13:09,629 INFO L87 Difference]: Start difference. First operand 143 states and 149 transitions. Second operand 18 states. [2020-10-29 09:13:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:11,816 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2020-10-29 09:13:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:13:11,817 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-10-29 09:13:11,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:11,819 INFO L225 Difference]: With dead ends: 201 [2020-10-29 09:13:11,819 INFO L226 Difference]: Without dead ends: 197 [2020-10-29 09:13:11,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:13:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-29 09:13:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2020-10-29 09:13:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-29 09:13:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 198 transitions. [2020-10-29 09:13:11,834 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 198 transitions. Word has length 78 [2020-10-29 09:13:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:11,835 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 198 transitions. [2020-10-29 09:13:11,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:13:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 198 transitions. [2020-10-29 09:13:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:13:11,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:11,836 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:11,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:13:11,836 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash 232091519, now seen corresponding path program 11 times [2020-10-29 09:13:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:11,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811479017] [2020-10-29 09:13:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:12,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:14,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:14,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:13:14,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:14,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2484 [2020-10-29 09:13:14,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:14,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:14,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:13:14,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:14,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 09:13:14,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:15,040 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-29 09:13:15,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:15,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:15,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:15,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:15,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:15,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:15,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:15,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:15,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:15,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:15,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:15,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 12 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:15,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811479017] [2020-10-29 09:13:15,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:15,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:13:15,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462986170] [2020-10-29 09:13:15,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:13:15,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:13:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:13:15,497 INFO L87 Difference]: Start difference. First operand 190 states and 198 transitions. Second operand 18 states. [2020-10-29 09:13:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:17,730 INFO L93 Difference]: Finished difference Result 225 states and 237 transitions. [2020-10-29 09:13:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:13:17,731 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-10-29 09:13:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:17,733 INFO L225 Difference]: With dead ends: 225 [2020-10-29 09:13:17,733 INFO L226 Difference]: Without dead ends: 192 [2020-10-29 09:13:17,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:13:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-29 09:13:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-10-29 09:13:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-29 09:13:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 197 transitions. [2020-10-29 09:13:17,752 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 197 transitions. Word has length 78 [2020-10-29 09:13:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:17,752 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 197 transitions. [2020-10-29 09:13:17,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:13:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 197 transitions. [2020-10-29 09:13:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 09:13:17,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:17,753 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:17,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:13:17,754 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:17,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:17,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1141519143, now seen corresponding path program 6 times [2020-10-29 09:13:17,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:17,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420988476] [2020-10-29 09:13:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:18,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:20,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:20,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:13:20,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:20,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2652 [2020-10-29 09:13:20,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:20,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:13:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:20,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 09:13:20,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:21,086 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-29 09:13:21,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:21,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:21,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:21,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:21,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:21,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:21,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:21,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:21,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:21,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:21,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:21,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420988476] [2020-10-29 09:13:21,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:21,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:13:21,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160414747] [2020-10-29 09:13:21,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:13:21,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:21,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:13:21,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:13:21,606 INFO L87 Difference]: Start difference. First operand 190 states and 197 transitions. Second operand 19 states. [2020-10-29 09:13:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:23,877 INFO L93 Difference]: Finished difference Result 200 states and 207 transitions. [2020-10-29 09:13:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:13:23,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-10-29 09:13:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:23,880 INFO L225 Difference]: With dead ends: 200 [2020-10-29 09:13:23,880 INFO L226 Difference]: Without dead ends: 196 [2020-10-29 09:13:23,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:13:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-29 09:13:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2020-10-29 09:13:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-29 09:13:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2020-10-29 09:13:23,896 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 82 [2020-10-29 09:13:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:23,897 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2020-10-29 09:13:23,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:13:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2020-10-29 09:13:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 09:13:23,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:23,898 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:23,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:13:23,898 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1947127764, now seen corresponding path program 14 times [2020-10-29 09:13:23,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:23,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528188894] [2020-10-29 09:13:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:23,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:24,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:28,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:28,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:13:28,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:28,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4833 [2020-10-29 09:13:28,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:28,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:28,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:13:28,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:28,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 09:13:28,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:29,469 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-29 09:13:29,647 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-29 09:13:30,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:30,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:30,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:30,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:30,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:30,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:13:30,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:30,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:30,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:30,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:30,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:30,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:30,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528188894] [2020-10-29 09:13:30,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:30,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:13:30,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945589021] [2020-10-29 09:13:30,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:13:30,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:30,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:13:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:13:30,127 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand 19 states. [2020-10-29 09:13:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:33,490 INFO L93 Difference]: Finished difference Result 231 states and 242 transitions. [2020-10-29 09:13:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:13:33,491 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-10-29 09:13:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:33,492 INFO L225 Difference]: With dead ends: 231 [2020-10-29 09:13:33,492 INFO L226 Difference]: Without dead ends: 205 [2020-10-29 09:13:33,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-29 09:13:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2020-10-29 09:13:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-29 09:13:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 167 transitions. [2020-10-29 09:13:33,509 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 167 transitions. Word has length 82 [2020-10-29 09:13:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:33,509 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 167 transitions. [2020-10-29 09:13:33,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:13:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 167 transitions. [2020-10-29 09:13:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 09:13:33,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:33,510 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:33,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:13:33,511 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:33,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1910844248, now seen corresponding path program 12 times [2020-10-29 09:13:33,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:33,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190932752] [2020-10-29 09:13:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:36,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:36,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:13:36,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:36,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3018 [2020-10-29 09:13:36,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:36,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:36,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:13:36,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:36,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 09:13:36,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:37,419 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-29 09:13:37,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:37,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:37,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:37,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:37,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:37,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:37,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:37,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:37,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:37,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:37,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:37,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:37,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190932752] [2020-10-29 09:13:37,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:37,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:13:37,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965273369] [2020-10-29 09:13:37,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:13:37,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:13:37,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:13:37,980 INFO L87 Difference]: Start difference. First operand 160 states and 167 transitions. Second operand 19 states. [2020-10-29 09:13:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:41,279 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2020-10-29 09:13:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:13:41,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-10-29 09:13:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:41,281 INFO L225 Difference]: With dead ends: 174 [2020-10-29 09:13:41,281 INFO L226 Difference]: Without dead ends: 170 [2020-10-29 09:13:41,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:41,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-29 09:13:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 162. [2020-10-29 09:13:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-29 09:13:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 169 transitions. [2020-10-29 09:13:41,296 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 169 transitions. Word has length 82 [2020-10-29 09:13:41,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:41,296 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 169 transitions. [2020-10-29 09:13:41,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:13:41,296 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 169 transitions. [2020-10-29 09:13:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 09:13:41,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:41,297 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:41,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:13:41,297 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:41,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:41,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2070932512, now seen corresponding path program 12 times [2020-10-29 09:13:41,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:41,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300395191] [2020-10-29 09:13:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:41,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:41,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:42,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:46,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 09:13:46,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:46,766 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-29 09:13:47,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:47,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:47,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:47,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:47,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:13:47,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:47,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-29 09:13:47,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300395191] [2020-10-29 09:13:47,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:47,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853619528] [2020-10-29 09:13:47,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:47,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:47,153 INFO L87 Difference]: Start difference. First operand 162 states and 169 transitions. Second operand 16 states. [2020-10-29 09:13:47,888 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:13:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:49,150 INFO L93 Difference]: Finished difference Result 218 states and 225 transitions. [2020-10-29 09:13:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:13:49,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-10-29 09:13:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:49,153 INFO L225 Difference]: With dead ends: 218 [2020-10-29 09:13:49,153 INFO L226 Difference]: Without dead ends: 212 [2020-10-29 09:13:49,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-29 09:13:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-10-29 09:13:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-29 09:13:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2020-10-29 09:13:49,174 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 86 [2020-10-29 09:13:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:49,174 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2020-10-29 09:13:49,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2020-10-29 09:13:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 09:13:49,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:49,175 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:49,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:13:49,176 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash 377725595, now seen corresponding path program 13 times [2020-10-29 09:13:49,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:49,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617870765] [2020-10-29 09:13:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:49,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:49,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:50,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:50,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking...