/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-queue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:47:14,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:47:14,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:47:14,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:47:14,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:47:14,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:47:14,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:47:14,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:47:14,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:47:14,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:47:14,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:47:14,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:47:14,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:47:14,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:47:14,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:47:14,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:47:14,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:47:14,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:47:14,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:47:14,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:47:14,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:47:14,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:47:14,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:47:14,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:47:14,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:47:14,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:47:14,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:47:14,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:47:14,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:47:14,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:47:14,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:47:14,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:47:14,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:47:14,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:47:14,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:47:14,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:47:14,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:47:14,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:47:14,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:47:14,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:47:14,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:47:14,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:47:15,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:47:15,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:47:15,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:47:15,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:47:15,079 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:47:15,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:47:15,079 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:47:15,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:47:15,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:47:15,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:47:15,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:47:15,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:47:15,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:47:15,082 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:47:15,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:47:15,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:47:15,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:47:15,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:47:15,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:47:15,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:47:15,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:47:15,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:47:15,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:47:15,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:47:15,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:47:15,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:47:15,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:47:15,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:47:15,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:47:15,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:47:15,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:47:15,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:47:15,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:47:15,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:47:15,607 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:47:15,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-queue-1.i [2020-10-27 19:47:15,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fae3f7d1/819cdbdd1afd4273ad79ddd1ed89645b/FLAGa8c26174f [2020-10-27 19:47:16,431 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:47:16,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-queue-1.i [2020-10-27 19:47:16,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fae3f7d1/819cdbdd1afd4273ad79ddd1ed89645b/FLAGa8c26174f [2020-10-27 19:47:16,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fae3f7d1/819cdbdd1afd4273ad79ddd1ed89645b [2020-10-27 19:47:16,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:47:16,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:47:16,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:47:16,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:47:16,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:47:16,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:47:16" (1/1) ... [2020-10-27 19:47:16,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7505599f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:16, skipping insertion in model container [2020-10-27 19:47:16,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:47:16" (1/1) ... [2020-10-27 19:47:16,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:47:16,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:47:17,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:47:17,125 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:47:17,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:47:17,291 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:47:17,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17 WrapperNode [2020-10-27 19:47:17,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:47:17,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:47:17,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:47:17,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:47:17,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (1/1) ... [2020-10-27 19:47:17,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (1/1) ... [2020-10-27 19:47:17,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (1/1) ... [2020-10-27 19:47:17,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (1/1) ... [2020-10-27 19:47:17,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (1/1) ... [2020-10-27 19:47:17,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (1/1) ... [2020-10-27 19:47:17,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (1/1) ... [2020-10-27 19:47:17,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:47:17,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:47:17,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:47:17,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:47:17,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (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 [2020-10-27 19:47:17,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:47:17,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:47:17,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:47:17,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:47:17,490 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:47:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:47:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:47:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:47:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:47:17,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:47:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:47:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:47:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:47:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:47:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:47:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:47:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:47:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:47:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:47:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:47:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:47:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:47:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:47:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:47:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:47:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:47:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:47:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:47:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:47:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:47:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:47:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:47:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:47:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:47:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:47:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:47:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:47:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:47:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:47:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:47:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:47:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:47:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:47:17,499 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:47:17,499 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:47:17,499 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:47:17,499 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:47:17,499 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:47:17,499 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:47:17,499 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:47:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:47:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:47:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:47:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:47:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:47:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:47:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:47:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:47:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:47:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:47:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:47:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:47:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:47:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:47:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:47:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:47:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:47:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:47:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:47:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:47:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:47:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:47:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:47:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:47:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:47:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:47:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:47:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:47:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:47:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:47:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:47:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:47:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:47:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:47:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:47:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:47:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:47:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:47:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:47:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:47:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:47:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:47:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:47:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:47:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:47:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:47:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:47:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:47:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:47:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:47:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:47:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:47:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:47:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:47:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:47:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:47:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:47:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:47:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:47:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:47:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:47:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:47:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:47:17,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:47:17,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:47:17,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:47:17,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:47:17,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:47:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:47:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:47:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:47:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:47:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:47:18,184 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:47:18,185 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-10-27 19:47:18,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:47:18 BoogieIcfgContainer [2020-10-27 19:47:18,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:47:18,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:47:18,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:47:18,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:47:18,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:47:16" (1/3) ... [2020-10-27 19:47:18,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8deab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:47:18, skipping insertion in model container [2020-10-27 19:47:18,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:47:17" (2/3) ... [2020-10-27 19:47:18,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8deab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:47:18, skipping insertion in model container [2020-10-27 19:47:18,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:47:18" (3/3) ... [2020-10-27 19:47:18,200 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-queue-1.i [2020-10-27 19:47:18,233 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:47:18,245 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:47:18,278 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:47:18,324 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:47:18,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:47:18,325 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:47:18,325 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:47:18,325 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:47:18,325 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:47:18,325 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:47:18,325 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:47:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-10-27 19:47:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-27 19:47:18,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:18,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:18,353 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:18,360 INFO L82 PathProgramCache]: Analyzing trace with hash 218866609, now seen corresponding path program 1 times [2020-10-27 19:47:18,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:18,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575879129] [2020-10-27 19:47:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:18,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:18,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 19:47:18,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:18,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-27 19:47:18,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:18,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:18,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:47:18,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:18,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:47:18,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:18,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:18,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:18,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:18,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 19:47:18,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:18,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:18,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:18,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:18,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:19,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575879129] [2020-10-27 19:47:19,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:19,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:47:19,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001310794] [2020-10-27 19:47:19,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:47:19,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:47:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:47:19,038 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2020-10-27 19:47:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:19,299 INFO L93 Difference]: Finished difference Result 168 states and 307 transitions. [2020-10-27 19:47:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:47:19,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-27 19:47:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:19,312 INFO L225 Difference]: With dead ends: 168 [2020-10-27 19:47:19,312 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 19:47:19,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:47:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 19:47:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 19:47:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:47:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2020-10-27 19:47:19,368 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 11 [2020-10-27 19:47:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:19,369 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2020-10-27 19:47:19,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:47:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2020-10-27 19:47:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 19:47:19,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:19,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:19,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:47:19,371 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash 794710855, now seen corresponding path program 1 times [2020-10-27 19:47:19,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:19,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8156087] [2020-10-27 19:47:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:19,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:19,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:19,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 19:47:19,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:19,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 19:47:19,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:19,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:19,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:19,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:47:19,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:19,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:19,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:19,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:19,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:19,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:19,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:47:19,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:19,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:19,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8156087] [2020-10-27 19:47:19,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:19,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:19,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260597690] [2020-10-27 19:47:19,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:19,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:19,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:19,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:19,658 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 4 states. [2020-10-27 19:47:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:19,847 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-10-27 19:47:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:19,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 19:47:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:19,850 INFO L225 Difference]: With dead ends: 76 [2020-10-27 19:47:19,850 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 19:47:19,851 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 [2020-10-27 19:47:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 19:47:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 19:47:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 19:47:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-27 19:47:19,869 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 12 [2020-10-27 19:47:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:19,870 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-27 19:47:19,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-27 19:47:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 19:47:19,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:19,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:19,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:47:19,871 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:19,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1246734287, now seen corresponding path program 1 times [2020-10-27 19:47:19,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:19,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884742097] [2020-10-27 19:47:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:19,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:19,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:19,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:47:19,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:19,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 19:47:19,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:47:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:47:19,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:20,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:20,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:20,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:20,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:20,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:47:20,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:20,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:20,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884742097] [2020-10-27 19:47:20,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:20,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:20,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836074509] [2020-10-27 19:47:20,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:20,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:20,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:20,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:20,054 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 4 states. [2020-10-27 19:47:20,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:20,210 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-27 19:47:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:20,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 19:47:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:20,212 INFO L225 Difference]: With dead ends: 71 [2020-10-27 19:47:20,212 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 19:47:20,213 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 [2020-10-27 19:47:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 19:47:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 19:47:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:47:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-27 19:47:20,223 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 15 [2020-10-27 19:47:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:20,224 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-27 19:47:20,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-27 19:47:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 19:47:20,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:20,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:20,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:47:20,225 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:20,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1069993799, now seen corresponding path program 1 times [2020-10-27 19:47:20,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:20,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817738245] [2020-10-27 19:47:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:20,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:20,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 19:47:20,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:20,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 19:47:20,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:20,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:47:20,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:20,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:20,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:20,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:20,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:47:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:20,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:20,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817738245] [2020-10-27 19:47:20,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:20,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:20,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417538804] [2020-10-27 19:47:20,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:20,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:20,336 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 4 states. [2020-10-27 19:47:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:20,531 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-27 19:47:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:20,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 19:47:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:20,533 INFO L225 Difference]: With dead ends: 146 [2020-10-27 19:47:20,533 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 19:47:20,534 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 [2020-10-27 19:47:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 19:47:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-27 19:47:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 19:47:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-27 19:47:20,545 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2020-10-27 19:47:20,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:20,545 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-27 19:47:20,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-27 19:47:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:47:20,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:20,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:20,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:47:20,547 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash 937711355, now seen corresponding path program 1 times [2020-10-27 19:47:20,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:20,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760688357] [2020-10-27 19:47:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:20,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:21,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:47:21,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:21,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-27 19:47:21,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:21,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 19:47:21,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:47:21,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:21,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:21,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:21,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:21,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:47:21,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:21,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:21,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:21,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:21,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:21,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760688357] [2020-10-27 19:47:21,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:21,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:21,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698819945] [2020-10-27 19:47:21,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:21,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:21,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:21,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:21,143 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 4 states. [2020-10-27 19:47:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:21,330 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-27 19:47:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:21,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 19:47:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:21,332 INFO L225 Difference]: With dead ends: 80 [2020-10-27 19:47:21,332 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 19:47:21,333 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 [2020-10-27 19:47:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 19:47:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-27 19:47:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 19:47:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-10-27 19:47:21,348 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 23 [2020-10-27 19:47:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:21,348 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-10-27 19:47:21,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-10-27 19:47:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:47:21,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:21,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:21,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:47:21,353 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash 939558397, now seen corresponding path program 1 times [2020-10-27 19:47:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:21,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81391039] [2020-10-27 19:47:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:21,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:21,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:47:21,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:21,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 19:47:21,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:21,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:47:21,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:21,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:47:21,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:21,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:21,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:21,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:21,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:21,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:47:21,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:21,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:21,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:21,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:21,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:21,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81391039] [2020-10-27 19:47:21,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:21,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:47:21,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134777545] [2020-10-27 19:47:21,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:47:21,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:21,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:47:21,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:47:21,649 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 5 states. [2020-10-27 19:47:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:21,847 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2020-10-27 19:47:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:47:21,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 19:47:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:21,849 INFO L225 Difference]: With dead ends: 98 [2020-10-27 19:47:21,849 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 19:47:21,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:47:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 19:47:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 19:47:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:47:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-27 19:47:21,869 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 23 [2020-10-27 19:47:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:21,869 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-27 19:47:21,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:47:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-27 19:47:21,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:47:21,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:21,870 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:21,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:47:21,871 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:21,872 INFO L82 PathProgramCache]: Analyzing trace with hash 309576248, now seen corresponding path program 1 times [2020-10-27 19:47:21,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:21,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737157587] [2020-10-27 19:47:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:21,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:22,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:47:22,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:22,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-27 19:47:22,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:22,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:47:22,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:22,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:47:22,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:22,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:22,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:22,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:22,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:22,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:47:22,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:22,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:22,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737157587] [2020-10-27 19:47:22,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:22,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:47:22,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375008597] [2020-10-27 19:47:22,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:47:22,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:47:22,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:47:22,186 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 7 states. [2020-10-27 19:47:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:22,485 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2020-10-27 19:47:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:47:22,485 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 19:47:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:22,487 INFO L225 Difference]: With dead ends: 130 [2020-10-27 19:47:22,487 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 19:47:22,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 19:47:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 84. [2020-10-27 19:47:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 19:47:22,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-10-27 19:47:22,503 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2020-10-27 19:47:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:22,504 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-10-27 19:47:22,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:47:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-10-27 19:47:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:47:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:22,510 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:22,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:47:22,510 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:22,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1376318958, now seen corresponding path program 1 times [2020-10-27 19:47:22,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:22,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665257318] [2020-10-27 19:47:22,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:22,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:22,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:47:22,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:22,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-27 19:47:22,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:22,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:22,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:47:22,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:47:22,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:22,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:22,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:22,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:22,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:22,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:22,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:22,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665257318] [2020-10-27 19:47:22,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:22,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:22,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920719968] [2020-10-27 19:47:22,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:22,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:22,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:22,883 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 4 states. [2020-10-27 19:47:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:23,097 INFO L93 Difference]: Finished difference Result 171 states and 215 transitions. [2020-10-27 19:47:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:23,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 19:47:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:23,099 INFO L225 Difference]: With dead ends: 171 [2020-10-27 19:47:23,099 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 19:47:23,100 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 [2020-10-27 19:47:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 19:47:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-27 19:47:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:47:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-10-27 19:47:23,116 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 26 [2020-10-27 19:47:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:23,118 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-10-27 19:47:23,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:23,119 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-10-27 19:47:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:47:23,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:23,122 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] [2020-10-27 19:47:23,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:47:23,123 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:23,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2123363362, now seen corresponding path program 1 times [2020-10-27 19:47:23,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:23,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023196339] [2020-10-27 19:47:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:47:23,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:23,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-27 19:47:23,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:47:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:47:23,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:23,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:23,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:23,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:23,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:23,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:23,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:23,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023196339] [2020-10-27 19:47:23,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:23,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:23,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097614704] [2020-10-27 19:47:23,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:23,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:23,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:23,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:23,424 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 4 states. [2020-10-27 19:47:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:23,600 INFO L93 Difference]: Finished difference Result 198 states and 247 transitions. [2020-10-27 19:47:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:23,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 19:47:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:23,602 INFO L225 Difference]: With dead ends: 198 [2020-10-27 19:47:23,602 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 19:47:23,603 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 [2020-10-27 19:47:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 19:47:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2020-10-27 19:47:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 19:47:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2020-10-27 19:47:23,612 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 30 [2020-10-27 19:47:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:23,612 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2020-10-27 19:47:23,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2020-10-27 19:47:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:47:23,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:23,616 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:23,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:47:23,616 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash -84648472, now seen corresponding path program 1 times [2020-10-27 19:47:23,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:23,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992126574] [2020-10-27 19:47:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:47:23,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:23,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-27 19:47:23,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:23,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:47:23,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:47:23,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:24,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:24,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:24,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:24,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:24,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:24,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:24,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:24,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:47:24,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992126574] [2020-10-27 19:47:24,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:24,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:24,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104702223] [2020-10-27 19:47:24,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:24,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:24,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:24,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:24,024 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 4 states. [2020-10-27 19:47:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:24,246 INFO L93 Difference]: Finished difference Result 221 states and 274 transitions. [2020-10-27 19:47:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:24,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 19:47:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:24,248 INFO L225 Difference]: With dead ends: 221 [2020-10-27 19:47:24,248 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 19:47:24,249 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 [2020-10-27 19:47:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 19:47:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2020-10-27 19:47:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:47:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-10-27 19:47:24,257 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 33 [2020-10-27 19:47:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:24,257 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-10-27 19:47:24,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-10-27 19:47:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:47:24,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:24,258 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:24,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:47:24,259 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:24,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2040254526, now seen corresponding path program 1 times [2020-10-27 19:47:24,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:24,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958137225] [2020-10-27 19:47:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:24,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:24,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:24,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:47:24,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:24,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-27 19:47:24,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:24,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:47:24,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:24,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:24,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:24,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:24,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:24,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:24,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:24,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:24,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:24,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:24,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958137225] [2020-10-27 19:47:24,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:24,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:47:24,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583985470] [2020-10-27 19:47:24,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:47:24,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:47:24,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:24,635 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 8 states. [2020-10-27 19:47:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:24,901 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-10-27 19:47:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:47:24,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 19:47:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:24,903 INFO L225 Difference]: With dead ends: 125 [2020-10-27 19:47:24,903 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 19:47:24,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 19:47:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-27 19:47:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 19:47:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-27 19:47:24,911 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 34 [2020-10-27 19:47:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:24,911 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-27 19:47:24,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:47:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-27 19:47:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:47:24,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:24,913 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:24,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:47:24,913 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1668646551, now seen corresponding path program 1 times [2020-10-27 19:47:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:24,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415068857] [2020-10-27 19:47:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:24,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:25,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:47:25,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:25,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 19:47:25,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:47:25,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:25,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:47:25,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:25,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:25,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:25,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:25,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:25,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:25,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:25,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:25,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:25,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:25,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:25,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415068857] [2020-10-27 19:47:25,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:25,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:47:25,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506808251] [2020-10-27 19:47:25,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:47:25,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:47:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:25,286 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 8 states. [2020-10-27 19:47:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:25,686 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2020-10-27 19:47:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:25,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 19:47:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:25,688 INFO L225 Difference]: With dead ends: 157 [2020-10-27 19:47:25,688 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 19:47:25,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 19:47:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2020-10-27 19:47:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 19:47:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2020-10-27 19:47:25,698 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 35 [2020-10-27 19:47:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:25,698 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2020-10-27 19:47:25,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:47:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2020-10-27 19:47:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:47:25,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:25,700 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:25,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:47:25,700 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:25,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1242507287, now seen corresponding path program 1 times [2020-10-27 19:47:25,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:25,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047133099] [2020-10-27 19:47:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:25,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:25,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:47:25,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:25,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 19:47:25,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:25,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:47:25,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:25,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:47:25,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:26,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:26,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:26,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:26,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:26,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:26,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:26,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:26,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047133099] [2020-10-27 19:47:26,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:26,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:47:26,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2330006] [2020-10-27 19:47:26,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:47:26,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:26,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:47:26,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:26,139 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand 8 states. [2020-10-27 19:47:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:26,520 INFO L93 Difference]: Finished difference Result 169 states and 197 transitions. [2020-10-27 19:47:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:47:26,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-27 19:47:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:26,523 INFO L225 Difference]: With dead ends: 169 [2020-10-27 19:47:26,523 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 19:47:26,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 19:47:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2020-10-27 19:47:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 19:47:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2020-10-27 19:47:26,542 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 37 [2020-10-27 19:47:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:26,542 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2020-10-27 19:47:26,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:47:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2020-10-27 19:47:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:47:26,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:26,544 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:26,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:47:26,544 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:26,545 INFO L82 PathProgramCache]: Analyzing trace with hash -28871154, now seen corresponding path program 1 times [2020-10-27 19:47:26,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:26,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376796416] [2020-10-27 19:47:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:26,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:27,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:47:27,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-27 19:47:27,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 19:47:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:47:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:27,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:27,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:27,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:27,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:27,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:27,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:27,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 19:47:27,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376796416] [2020-10-27 19:47:27,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:27,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:27,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143334333] [2020-10-27 19:47:27,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:27,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:27,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:27,078 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand 4 states. [2020-10-27 19:47:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:27,264 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-10-27 19:47:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:27,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-27 19:47:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:27,266 INFO L225 Difference]: With dead ends: 211 [2020-10-27 19:47:27,266 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 19:47:27,267 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 [2020-10-27 19:47:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 19:47:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-10-27 19:47:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:47:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-10-27 19:47:27,275 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 42 [2020-10-27 19:47:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:27,275 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-10-27 19:47:27,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-10-27 19:47:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:27,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:27,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:27,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:47:27,277 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash 989426657, now seen corresponding path program 1 times [2020-10-27 19:47:27,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:27,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571938573] [2020-10-27 19:47:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:27,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:28,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:28,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:47:28,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-10-27 19:47:28,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:28,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:47:28,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 19:47:28,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:47:28,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:47:28,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:28,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:28,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:28,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:28,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:28,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:28,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:47:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:47:28,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571938573] [2020-10-27 19:47:28,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:28,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:47:28,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136115790] [2020-10-27 19:47:28,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:47:28,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:47:28,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:47:28,451 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 6 states. [2020-10-27 19:47:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:28,686 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-10-27 19:47:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:47:28,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-27 19:47:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:28,687 INFO L225 Difference]: With dead ends: 119 [2020-10-27 19:47:28,687 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:47:28,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:47:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:47:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-27 19:47:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:47:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-27 19:47:28,704 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 43 [2020-10-27 19:47:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:28,704 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-27 19:47:28,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:47:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-27 19:47:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:28,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:28,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:28,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:47:28,706 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:28,706 INFO L82 PathProgramCache]: Analyzing trace with hash 402620643, now seen corresponding path program 1 times [2020-10-27 19:47:28,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:28,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809209831] [2020-10-27 19:47:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:28,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:28,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:28,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:28,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 19:47:28,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:28,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:47:28,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:28,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:28,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:29,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:29,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:29,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:29,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:29,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:29,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:29,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:29,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:29,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:29,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809209831] [2020-10-27 19:47:29,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:29,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:47:29,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959307692] [2020-10-27 19:47:29,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:47:29,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:29,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:47:29,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:29,065 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2020-10-27 19:47:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:29,422 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-10-27 19:47:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:47:29,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-27 19:47:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:29,439 INFO L225 Difference]: With dead ends: 120 [2020-10-27 19:47:29,439 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 19:47:29,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 19:47:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 19:47:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:47:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-27 19:47:29,447 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 43 [2020-10-27 19:47:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:29,447 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-27 19:47:29,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:47:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-27 19:47:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:47:29,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:29,448 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:29,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:47:29,448 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:29,449 INFO L82 PathProgramCache]: Analyzing trace with hash -579609298, now seen corresponding path program 1 times [2020-10-27 19:47:29,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:29,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43152772] [2020-10-27 19:47:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:29,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:29,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:29,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:47:29,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:29,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-27 19:47:29,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:29,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:29,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:29,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:47:29,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:29,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:29,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:29,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:29,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:29,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:29,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:29,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:29,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:29,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:29,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:29,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 19:47:29,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43152772] [2020-10-27 19:47:29,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:29,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:47:29,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657210502] [2020-10-27 19:47:29,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:47:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:47:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:29,920 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 8 states. [2020-10-27 19:47:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:30,152 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-27 19:47:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:47:30,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-27 19:47:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:30,153 INFO L225 Difference]: With dead ends: 84 [2020-10-27 19:47:30,154 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 19:47:30,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:30,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 19:47:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-27 19:47:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 19:47:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-27 19:47:30,161 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 44 [2020-10-27 19:47:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:30,161 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-27 19:47:30,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:47:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-27 19:47:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:47:30,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:30,162 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:30,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:47:30,162 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1664297424, now seen corresponding path program 1 times [2020-10-27 19:47:30,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:30,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837031433] [2020-10-27 19:47:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:30,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:30,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:47:30,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:30,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 19:47:30,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:30,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:47:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:47:30,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:30,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:30,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:30,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:30,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:30,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:30,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:30,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:30,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837031433] [2020-10-27 19:47:30,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:30,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:30,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710931767] [2020-10-27 19:47:30,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:30,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:30,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:30,824 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 10 states. [2020-10-27 19:47:31,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:31,174 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-27 19:47:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:47:31,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-27 19:47:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:31,176 INFO L225 Difference]: With dead ends: 102 [2020-10-27 19:47:31,176 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:47:31,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:31,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:47:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-27 19:47:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 19:47:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-10-27 19:47:31,183 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 46 [2020-10-27 19:47:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:31,183 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-10-27 19:47:31,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-10-27 19:47:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:47:31,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:31,184 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-27 19:47:31,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:47:31,184 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash -501133880, now seen corresponding path program 1 times [2020-10-27 19:47:31,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:31,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181778492] [2020-10-27 19:47:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:31,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:47:31,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:31,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 19:47:31,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:47:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 19:47:31,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:47:31,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:47:31,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:31,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:31,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:31,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:31,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:31,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:31,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:31,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:31,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 19:47:31,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181778492] [2020-10-27 19:47:31,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:31,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:47:31,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144800968] [2020-10-27 19:47:31,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:47:31,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:47:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:47:31,787 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 4 states. [2020-10-27 19:47:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:31,963 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-27 19:47:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:47:31,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-27 19:47:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:31,964 INFO L225 Difference]: With dead ends: 112 [2020-10-27 19:47:31,964 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 19:47:31,965 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 [2020-10-27 19:47:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 19:47:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-27 19:47:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 19:47:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2020-10-27 19:47:31,973 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 47 [2020-10-27 19:47:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:31,974 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2020-10-27 19:47:31,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:47:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2020-10-27 19:47:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:47:31,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:31,975 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-27 19:47:31,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:47:31,975 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:31,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1666759241, now seen corresponding path program 1 times [2020-10-27 19:47:31,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:31,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953216333] [2020-10-27 19:47:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:32,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:47:32,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:32,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 19:47:32,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:32,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:32,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:32,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:47:32,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:32,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:32,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:32,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:32,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:32,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:47:32,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:32,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:32,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:32,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:32,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:32,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953216333] [2020-10-27 19:47:32,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:32,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:47:32,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129296830] [2020-10-27 19:47:32,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:47:32,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:32,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:47:32,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:32,472 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 9 states. [2020-10-27 19:47:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:32,772 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-27 19:47:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:47:32,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-27 19:47:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:32,774 INFO L225 Difference]: With dead ends: 90 [2020-10-27 19:47:32,774 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 19:47:32,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 19:47:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-27 19:47:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 19:47:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-27 19:47:32,781 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 47 [2020-10-27 19:47:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:32,781 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-27 19:47:32,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:47:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-27 19:47:32,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:47:32,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:32,782 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2020-10-27 19:47:32,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:47:32,782 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:32,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:32,783 INFO L82 PathProgramCache]: Analyzing trace with hash -127104064, now seen corresponding path program 1 times [2020-10-27 19:47:32,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:32,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987830855] [2020-10-27 19:47:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:32,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:33,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:33,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:47:33,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:33,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-27 19:47:33,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:33,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:33,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:33,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:47:33,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:33,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:33,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:33,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:33,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:33,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:47:33,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:33,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:33,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987830855] [2020-10-27 19:47:33,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:33,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:47:33,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358095095] [2020-10-27 19:47:33,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:47:33,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:33,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:47:33,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:33,419 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 9 states. [2020-10-27 19:47:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:33,895 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-10-27 19:47:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:47:33,896 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-27 19:47:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:33,897 INFO L225 Difference]: With dead ends: 129 [2020-10-27 19:47:33,897 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 19:47:33,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 19:47:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-27 19:47:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 19:47:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2020-10-27 19:47:33,908 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 50 [2020-10-27 19:47:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:33,908 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2020-10-27 19:47:33,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:47:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2020-10-27 19:47:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 19:47:33,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:33,909 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:33,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:47:33,909 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:33,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2035219383, now seen corresponding path program 1 times [2020-10-27 19:47:33,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:33,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363015164] [2020-10-27 19:47:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:33,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:34,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:34,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 19:47:34,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:34,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-27 19:47:34,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:34,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:34,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:34,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 19:47:34,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:34,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:34,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:34,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:34,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:34,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:34,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:34,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:34,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:34,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:34,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:34,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:34,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363015164] [2020-10-27 19:47:34,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:34,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:47:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619335743] [2020-10-27 19:47:34,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:47:34,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:47:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:34,595 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 9 states. [2020-10-27 19:47:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:35,086 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-27 19:47:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:47:35,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 19:47:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:35,089 INFO L225 Difference]: With dead ends: 128 [2020-10-27 19:47:35,090 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 19:47:35,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 19:47:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2020-10-27 19:47:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 19:47:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-27 19:47:35,099 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 53 [2020-10-27 19:47:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:35,099 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-27 19:47:35,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:47:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-27 19:47:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 19:47:35,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:35,100 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:35,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:47:35,101 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash -981588100, now seen corresponding path program 1 times [2020-10-27 19:47:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:35,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474884920] [2020-10-27 19:47:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:35,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:35,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:35,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 19:47:35,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:35,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 19:47:35,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 19:47:35,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:35,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:35,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:35,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:35,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:35,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:35,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474884920] [2020-10-27 19:47:35,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:35,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:35,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570145551] [2020-10-27 19:47:35,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:35,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:35,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:35,722 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 10 states. [2020-10-27 19:47:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:36,210 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-27 19:47:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:36,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 19:47:36,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:36,211 INFO L225 Difference]: With dead ends: 136 [2020-10-27 19:47:36,211 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 19:47:36,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 19:47:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2020-10-27 19:47:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 19:47:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-10-27 19:47:36,223 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 54 [2020-10-27 19:47:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:36,223 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-10-27 19:47:36,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-10-27 19:47:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 19:47:36,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:36,224 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:36,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:47:36,224 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:36,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2141977510, now seen corresponding path program 2 times [2020-10-27 19:47:36,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:36,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078381806] [2020-10-27 19:47:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:36,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:36,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:36,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 19:47:36,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-27 19:47:36,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 19:47:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:36,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:36,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:36,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:36,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:36,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:36,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:36,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:36,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:36,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078381806] [2020-10-27 19:47:36,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:36,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:36,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918363464] [2020-10-27 19:47:36,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:36,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:36,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:36,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:36,940 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-10-27 19:47:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:37,402 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-27 19:47:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:47:37,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 19:47:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:37,403 INFO L225 Difference]: With dead ends: 133 [2020-10-27 19:47:37,403 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 19:47:37,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 19:47:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-10-27 19:47:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 19:47:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-27 19:47:37,414 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 59 [2020-10-27 19:47:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:37,414 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-27 19:47:37,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-27 19:47:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 19:47:37,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:37,415 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:37,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:47:37,415 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:37,416 INFO L82 PathProgramCache]: Analyzing trace with hash 999069460, now seen corresponding path program 1 times [2020-10-27 19:47:37,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:37,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48257850] [2020-10-27 19:47:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:37,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:37,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 19:47:37,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:37,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-27 19:47:37,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:37,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 19:47:37,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:38,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:38,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:38,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:38,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:38,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:38,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:38,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:38,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:38,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48257850] [2020-10-27 19:47:38,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:38,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:38,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238958171] [2020-10-27 19:47:38,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:38,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:38,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:38,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:38,092 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 11 states. [2020-10-27 19:47:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:38,450 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-10-27 19:47:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:47:38,451 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-27 19:47:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:38,452 INFO L225 Difference]: With dead ends: 132 [2020-10-27 19:47:38,452 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 19:47:38,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 19:47:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-27 19:47:38,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 19:47:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-27 19:47:38,462 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 61 [2020-10-27 19:47:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:38,462 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-27 19:47:38,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-27 19:47:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 19:47:38,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:38,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2020-10-27 19:47:38,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:47:38,464 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1486843080, now seen corresponding path program 2 times [2020-10-27 19:47:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:38,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829469260] [2020-10-27 19:47:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:38,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:38,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 19:47:38,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:38,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-27 19:47:38,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:47:38,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:39,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:39,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:39,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:39,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:39,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:39,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:39,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:39,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:39,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:39,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:39,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829469260] [2020-10-27 19:47:39,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:39,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:39,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386147603] [2020-10-27 19:47:39,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:39,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:39,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:39,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:39,046 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 11 states. [2020-10-27 19:47:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:39,561 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2020-10-27 19:47:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:39,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-27 19:47:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:39,563 INFO L225 Difference]: With dead ends: 142 [2020-10-27 19:47:39,563 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:47:39,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:47:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:47:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-27 19:47:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:47:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-27 19:47:39,572 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 62 [2020-10-27 19:47:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:39,572 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-27 19:47:39,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-27 19:47:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 19:47:39,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:39,573 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:39,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:47:39,574 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -667120273, now seen corresponding path program 2 times [2020-10-27 19:47:39,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:39,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303589899] [2020-10-27 19:47:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:39,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:40,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 19:47:40,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:40,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-27 19:47:40,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:40,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:40,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:40,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 19:47:40,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:40,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:40,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:40,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:40,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:40,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:40,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:40,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:40,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:40,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:40,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:40,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303589899] [2020-10-27 19:47:40,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:40,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:40,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410058968] [2020-10-27 19:47:40,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:40,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:40,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:40,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:40,638 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 11 states. [2020-10-27 19:47:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:41,208 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2020-10-27 19:47:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:41,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-27 19:47:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:41,210 INFO L225 Difference]: With dead ends: 148 [2020-10-27 19:47:41,210 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 19:47:41,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 19:47:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2020-10-27 19:47:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 19:47:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-27 19:47:41,219 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 62 [2020-10-27 19:47:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:41,219 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-27 19:47:41,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-27 19:47:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 19:47:41,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:41,220 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:41,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:47:41,221 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1787771808, now seen corresponding path program 1 times [2020-10-27 19:47:41,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:41,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478408560] [2020-10-27 19:47:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:41,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 19:47:41,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:41,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-27 19:47:41,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:41,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:41,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:41,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 19:47:41,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:42,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:42,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:42,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:42,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:42,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:42,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:47:42,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:42,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:42,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:42,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478408560] [2020-10-27 19:47:42,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:42,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:42,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915626830] [2020-10-27 19:47:42,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:42,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:42,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:42,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:42,196 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 12 states. [2020-10-27 19:47:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:42,711 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2020-10-27 19:47:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:42,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-27 19:47:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:42,713 INFO L225 Difference]: With dead ends: 156 [2020-10-27 19:47:42,713 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 19:47:42,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 19:47:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2020-10-27 19:47:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 19:47:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-10-27 19:47:42,725 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 69 [2020-10-27 19:47:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:42,725 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-10-27 19:47:42,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-10-27 19:47:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 19:47:42,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:42,726 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1] [2020-10-27 19:47:42,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:47:42,727 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:42,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1551765751, now seen corresponding path program 3 times [2020-10-27 19:47:42,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:42,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411725368] [2020-10-27 19:47:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:42,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:43,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:43,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 19:47:43,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-10-27 19:47:43,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 19:47:43,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:44,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:44,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:44,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:44,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:44,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:44,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:44,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:44,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:44,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411725368] [2020-10-27 19:47:44,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:44,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:44,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172564411] [2020-10-27 19:47:44,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:44,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:44,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:44,142 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 12 states. [2020-10-27 19:47:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:44,793 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2020-10-27 19:47:44,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:44,794 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-27 19:47:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:44,795 INFO L225 Difference]: With dead ends: 138 [2020-10-27 19:47:44,795 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 19:47:44,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 19:47:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 107. [2020-10-27 19:47:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 19:47:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-27 19:47:44,806 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 71 [2020-10-27 19:47:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:44,807 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-27 19:47:44,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-27 19:47:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 19:47:44,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:44,808 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:44,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:47:44,808 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:44,809 INFO L82 PathProgramCache]: Analyzing trace with hash -685185620, now seen corresponding path program 2 times [2020-10-27 19:47:44,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:44,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7067908] [2020-10-27 19:47:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:44,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:44,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:45,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:45,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 19:47:45,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:45,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-27 19:47:45,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:45,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:47:45,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 19:47:45,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:45,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:46,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:46,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:46,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:46,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:46,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:46,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:46,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:46,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:46,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:46,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:46,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 19:47:46,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7067908] [2020-10-27 19:47:46,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:46,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:47:46,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918705425] [2020-10-27 19:47:46,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:47:46,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:47:46,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:46,133 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 9 states. [2020-10-27 19:47:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:46,511 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2020-10-27 19:47:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:47:46,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-27 19:47:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:46,513 INFO L225 Difference]: With dead ends: 136 [2020-10-27 19:47:46,513 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 19:47:46,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 19:47:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-10-27 19:47:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 19:47:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-27 19:47:46,526 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 77 [2020-10-27 19:47:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:46,526 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-27 19:47:46,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:47:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-27 19:47:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 19:47:46,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:46,528 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:46,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:47:46,528 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:46,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1375814022, now seen corresponding path program 3 times [2020-10-27 19:47:46,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:46,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593724113] [2020-10-27 19:47:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:46,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:47,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:47,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 19:47:47,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:47,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-27 19:47:47,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:47,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:47,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:47,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:47:47,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:47,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:47,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:47,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:47,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:47,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:47,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:47:47,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:47,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:47,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:47,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593724113] [2020-10-27 19:47:47,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:47,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:47,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686236814] [2020-10-27 19:47:47,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:47,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:47,596 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 13 states. [2020-10-27 19:47:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:48,151 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-27 19:47:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:48,151 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-10-27 19:47:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:48,153 INFO L225 Difference]: With dead ends: 133 [2020-10-27 19:47:48,153 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 19:47:48,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 19:47:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 86. [2020-10-27 19:47:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 19:47:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-27 19:47:48,163 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 78 [2020-10-27 19:47:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:48,163 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-27 19:47:48,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-27 19:47:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 19:47:48,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:48,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:48,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:47:48,165 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1216283912, now seen corresponding path program 4 times [2020-10-27 19:47:48,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:48,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516890869] [2020-10-27 19:47:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:48,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:48,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:48,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 19:47:48,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:48,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-27 19:47:48,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 19:47:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:49,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:49,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:49,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:49,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:49,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:47:49,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:49,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516890869] [2020-10-27 19:47:49,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:49,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:49,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876899244] [2020-10-27 19:47:49,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:49,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:49,255 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 13 states. [2020-10-27 19:47:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:49,992 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-27 19:47:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:49,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-10-27 19:47:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:49,994 INFO L225 Difference]: With dead ends: 153 [2020-10-27 19:47:49,994 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 19:47:49,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:47:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 19:47:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-27 19:47:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:47:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-27 19:47:50,004 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 85 [2020-10-27 19:47:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:50,005 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-27 19:47:50,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-27 19:47:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 19:47:50,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:50,006 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:50,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:47:50,006 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1051618334, now seen corresponding path program 5 times [2020-10-27 19:47:50,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:50,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374306316] [2020-10-27 19:47:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:50,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:51,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:51,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 19:47:51,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:51,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-10-27 19:47:51,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:47:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:51,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 19:47:51,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:51,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:51,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:51,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:51,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:51,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:51,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:51,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:51,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:51,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:51,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:51,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:51,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374306316] [2020-10-27 19:47:51,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:51,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:51,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638576200] [2020-10-27 19:47:51,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:51,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:51,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:51,624 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 14 states. [2020-10-27 19:47:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:52,605 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2020-10-27 19:47:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:47:52,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-27 19:47:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:52,608 INFO L225 Difference]: With dead ends: 169 [2020-10-27 19:47:52,608 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 19:47:52,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 19:47:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-27 19:47:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 19:47:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-10-27 19:47:52,621 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 94 [2020-10-27 19:47:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:52,622 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-10-27 19:47:52,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-10-27 19:47:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 19:47:52,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:52,623 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:52,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:47:52,623 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1566970006, now seen corresponding path program 6 times [2020-10-27 19:47:52,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:52,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211953747] [2020-10-27 19:47:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:52,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:53,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:53,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 19:47:53,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:53,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-27 19:47:53,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:47:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 19:47:53,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:54,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:54,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:54,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 16 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211953747] [2020-10-27 19:47:54,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:54,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:47:54,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910944074] [2020-10-27 19:47:54,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:47:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:54,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:47:54,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:54,240 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 15 states. [2020-10-27 19:47:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:55,346 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2020-10-27 19:47:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:47:55,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2020-10-27 19:47:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:55,348 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:47:55,348 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 19:47:55,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:47:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 19:47:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-27 19:47:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 19:47:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-27 19:47:55,361 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2020-10-27 19:47:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:55,361 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-27 19:47:55,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:47:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-27 19:47:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 19:47:55,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:55,363 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:55,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:47:55,363 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash 670492088, now seen corresponding path program 7 times [2020-10-27 19:47:55,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:55,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724861038] [2020-10-27 19:47:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:55,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:56,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:56,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 19:47:56,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:56,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-10-27 19:47:56,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:47:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:56,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 19:47:56,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:57,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:57,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:57,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:57,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:57,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:57,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:57,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:57,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:57,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:57,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:57,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724861038] [2020-10-27 19:47:57,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:57,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:47:57,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653047763] [2020-10-27 19:47:57,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:47:57,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:47:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:57,421 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-10-27 19:47:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:58,624 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2020-10-27 19:47:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:47:58,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 103 [2020-10-27 19:47:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:58,627 INFO L225 Difference]: With dead ends: 178 [2020-10-27 19:47:58,627 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 19:47:58,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:47:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 19:47:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 141. [2020-10-27 19:47:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 19:47:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-10-27 19:47:58,645 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 103 [2020-10-27 19:47:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:58,645 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-10-27 19:47:58,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:47:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-10-27 19:47:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 19:47:58,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:58,647 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:58,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:47:58,647 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:58,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1300508420, now seen corresponding path program 8 times [2020-10-27 19:47:58,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:58,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456821469] [2020-10-27 19:47:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:58,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:59,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:59,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 19:47:59,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:59,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-27 19:47:59,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:59,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 19:47:59,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:59,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 19:47:59,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:00,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:00,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:00,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:00,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:00,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:00,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:00,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:00,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:00,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:00,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456821469] [2020-10-27 19:48:00,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:00,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:00,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607686038] [2020-10-27 19:48:00,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:00,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:00,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:00,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:00,582 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 16 states. [2020-10-27 19:48:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:01,871 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2020-10-27 19:48:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:48:01,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 111 [2020-10-27 19:48:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:01,874 INFO L225 Difference]: With dead ends: 186 [2020-10-27 19:48:01,874 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 19:48:01,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 19:48:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2020-10-27 19:48:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 19:48:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2020-10-27 19:48:01,893 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 111 [2020-10-27 19:48:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:01,894 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2020-10-27 19:48:01,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2020-10-27 19:48:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 19:48:01,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:01,895 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:01,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:48:01,896 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash -631989922, now seen corresponding path program 9 times [2020-10-27 19:48:01,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:01,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867766927] [2020-10-27 19:48:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:03,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:03,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 19:48:03,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:03,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1371 [2020-10-27 19:48:03,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:03,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:48:03,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:03,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 19:48:03,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:04,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:04,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:04,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:04,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:04,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:04,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:04,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:04,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:04,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:04,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867766927] [2020-10-27 19:48:04,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:04,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:48:04,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141450153] [2020-10-27 19:48:04,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:48:04,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:48:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:04,387 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 17 states. [2020-10-27 19:48:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:05,618 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2020-10-27 19:48:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:48:05,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-27 19:48:05,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:05,621 INFO L225 Difference]: With dead ends: 245 [2020-10-27 19:48:05,621 INFO L226 Difference]: Without dead ends: 241 [2020-10-27 19:48:05,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-27 19:48:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-10-27 19:48:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 19:48:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2020-10-27 19:48:05,644 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 112 [2020-10-27 19:48:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:05,645 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2020-10-27 19:48:05,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:48:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2020-10-27 19:48:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 19:48:05,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:05,647 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:05,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:48:05,647 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:05,647 INFO L82 PathProgramCache]: Analyzing trace with hash 503934032, now seen corresponding path program 10 times [2020-10-27 19:48:05,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:05,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067034566] [2020-10-27 19:48:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:05,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:07,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:07,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 19:48:07,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:07,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1585 [2020-10-27 19:48:07,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:07,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:48:07,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:07,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 19:48:07,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:07,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:07,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:07,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:07,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:07,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:07,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:48:07,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:07,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:07,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:07,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:07,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 20 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:08,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067034566] [2020-10-27 19:48:08,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:08,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:48:08,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978875634] [2020-10-27 19:48:08,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:48:08,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:48:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:08,070 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand 17 states. [2020-10-27 19:48:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:09,566 INFO L93 Difference]: Finished difference Result 224 states and 227 transitions. [2020-10-27 19:48:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:48:09,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 119 [2020-10-27 19:48:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:09,569 INFO L225 Difference]: With dead ends: 224 [2020-10-27 19:48:09,569 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 19:48:09,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:48:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 19:48:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-27 19:48:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 19:48:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-27 19:48:09,581 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 119 [2020-10-27 19:48:09,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:09,581 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-27 19:48:09,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:48:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-27 19:48:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 19:48:09,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:09,582 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:09,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:48:09,582 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:09,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1356782762, now seen corresponding path program 11 times [2020-10-27 19:48:09,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:09,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417870121] [2020-10-27 19:48:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:09,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:11,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:11,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 19:48:11,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:11,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1545 [2020-10-27 19:48:11,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:11,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:48:11,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:11,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 19:48:11,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:11,851 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-27 19:48:12,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:12,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:12,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:12,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:12,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:12,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:12,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:12,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:12,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:12,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:12,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:12,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417870121] [2020-10-27 19:48:12,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:12,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:48:12,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309647107] [2020-10-27 19:48:12,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:48:12,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:12,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:48:12,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:12,344 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 18 states. [2020-10-27 19:48:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:13,963 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2020-10-27 19:48:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:48:13,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-10-27 19:48:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:13,966 INFO L225 Difference]: With dead ends: 195 [2020-10-27 19:48:13,966 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 19:48:13,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:48:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 19:48:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 158. [2020-10-27 19:48:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 19:48:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-27 19:48:13,980 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 120 [2020-10-27 19:48:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:13,981 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-27 19:48:13,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:48:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-27 19:48:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 19:48:13,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:13,982 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:13,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:48:13,983 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:13,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:13,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1112514680, now seen corresponding path program 12 times [2020-10-27 19:48:13,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:13,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355137642] [2020-10-27 19:48:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:14,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:15,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:15,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 19:48:15,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:15,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-27 19:48:15,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:15,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 19:48:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 19:48:15,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,878 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-27 19:48:16,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:16,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:16,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:16,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355137642] [2020-10-27 19:48:16,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:16,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:48:16,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121484606] [2020-10-27 19:48:16,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:48:16,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:48:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:16,510 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 18 states. [2020-10-27 19:48:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:17,785 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2020-10-27 19:48:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:48:17,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-10-27 19:48:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:17,787 INFO L225 Difference]: With dead ends: 194 [2020-10-27 19:48:17,787 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 19:48:17,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:48:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 19:48:17,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2020-10-27 19:48:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 19:48:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-27 19:48:17,805 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 121 [2020-10-27 19:48:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:17,805 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-27 19:48:17,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:48:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-27 19:48:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 19:48:17,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:17,806 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:17,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:48:17,807 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1966664714, now seen corresponding path program 13 times [2020-10-27 19:48:17,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:17,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245389632] [2020-10-27 19:48:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:18,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:19,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:19,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 19:48:19,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:19,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1651 [2020-10-27 19:48:19,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:19,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 19:48:19,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:19,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 19:48:19,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:20,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:20,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:20,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:20,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:20,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:20,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:20,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:20,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:20,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:20,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:20,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:20,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245389632] [2020-10-27 19:48:20,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:20,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:48:20,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198717435] [2020-10-27 19:48:20,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:48:20,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:48:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:20,687 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 18 states. [2020-10-27 19:48:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:22,647 INFO L93 Difference]: Finished difference Result 211 states and 214 transitions. [2020-10-27 19:48:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:48:22,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 128 [2020-10-27 19:48:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:22,649 INFO L225 Difference]: With dead ends: 211 [2020-10-27 19:48:22,649 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 19:48:22,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:48:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 19:48:22,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 166. [2020-10-27 19:48:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 19:48:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-27 19:48:22,664 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 128 [2020-10-27 19:48:22,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:22,665 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-27 19:48:22,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:48:22,665 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-27 19:48:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 19:48:22,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:22,666 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:22,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:48:22,666 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:22,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2077632964, now seen corresponding path program 14 times [2020-10-27 19:48:22,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:22,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624997686] [2020-10-27 19:48:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:22,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:24,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:24,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 19:48:24,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:24,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1823 [2020-10-27 19:48:24,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:24,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 19:48:24,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:24,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 19:48:24,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:25,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:25,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:25,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:25,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:25,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:25,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:25,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624997686] [2020-10-27 19:48:25,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:25,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:48:25,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093747811] [2020-10-27 19:48:25,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:48:25,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:25,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:48:25,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:48:25,846 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 19 states. [2020-10-27 19:48:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:27,360 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2020-10-27 19:48:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:48:27,361 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 129 [2020-10-27 19:48:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:27,362 INFO L225 Difference]: With dead ends: 210 [2020-10-27 19:48:27,362 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 19:48:27,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:48:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 19:48:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 166. [2020-10-27 19:48:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 19:48:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-27 19:48:27,378 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 129 [2020-10-27 19:48:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:27,378 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-27 19:48:27,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:48:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-27 19:48:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 19:48:27,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:27,379 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:27,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:48:27,380 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:27,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:27,380 INFO L82 PathProgramCache]: Analyzing trace with hash 349781826, now seen corresponding path program 15 times [2020-10-27 19:48:27,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:27,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383899219] [2020-10-27 19:48:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:27,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:29,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:29,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 19:48:29,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:29,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1646 [2020-10-27 19:48:29,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:29,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 19:48:29,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:29,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 19:48:29,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:29,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:29,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 24 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:30,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383899219] [2020-10-27 19:48:30,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:30,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:48:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015982880] [2020-10-27 19:48:30,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:48:30,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:48:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:48:30,087 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 19 states. [2020-10-27 19:48:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:32,070 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2020-10-27 19:48:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:48:32,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-10-27 19:48:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:32,072 INFO L225 Difference]: With dead ends: 220 [2020-10-27 19:48:32,072 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 19:48:32,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:48:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 19:48:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-27 19:48:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:48:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2020-10-27 19:48:32,085 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2020-10-27 19:48:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:32,085 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2020-10-27 19:48:32,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:48:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2020-10-27 19:48:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 19:48:32,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:32,087 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:32,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:48:32,087 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1930733328, now seen corresponding path program 16 times [2020-10-27 19:48:32,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:32,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372350564] [2020-10-27 19:48:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:34,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:34,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 19:48:34,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:34,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1981 [2020-10-27 19:48:34,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 19:48:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:34,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-27 19:48:34,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:34,770 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-27 19:48:34,943 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-27 19:48:35,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:35,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:35,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:35,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:35,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:35,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:35,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:35,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372350564] [2020-10-27 19:48:35,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:35,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 19:48:35,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996807141] [2020-10-27 19:48:35,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 19:48:35,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 19:48:35,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:48:35,593 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 20 states. [2020-10-27 19:48:37,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:37,344 INFO L93 Difference]: Finished difference Result 228 states and 231 transitions. [2020-10-27 19:48:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:48:37,344 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2020-10-27 19:48:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:37,346 INFO L225 Difference]: With dead ends: 228 [2020-10-27 19:48:37,346 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 19:48:37,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:48:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 19:48:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 175. [2020-10-27 19:48:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 19:48:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-10-27 19:48:37,367 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 137 [2020-10-27 19:48:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:37,367 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-10-27 19:48:37,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 19:48:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-10-27 19:48:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 19:48:37,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:37,369 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:37,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:48:37,369 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1160308644, now seen corresponding path program 17 times [2020-10-27 19:48:37,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:37,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663464321] [2020-10-27 19:48:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:37,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:39,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:39,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 19:48:39,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2366 [2020-10-27 19:48:39,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 19:48:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:39,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-27 19:48:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:40,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:40,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:41,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663464321] [2020-10-27 19:48:41,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:41,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 19:48:41,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000647399] [2020-10-27 19:48:41,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 19:48:41,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:41,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 19:48:41,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:48:41,130 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 20 states. [2020-10-27 19:48:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:43,285 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2020-10-27 19:48:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:48:43,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2020-10-27 19:48:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:43,288 INFO L225 Difference]: With dead ends: 236 [2020-10-27 19:48:43,288 INFO L226 Difference]: Without dead ends: 232 [2020-10-27 19:48:43,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:48:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-27 19:48:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 183. [2020-10-27 19:48:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 19:48:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-10-27 19:48:43,308 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 145 [2020-10-27 19:48:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:43,309 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-10-27 19:48:43,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 19:48:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-10-27 19:48:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 19:48:43,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:43,310 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:43,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:48:43,310 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:43,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1932398282, now seen corresponding path program 18 times [2020-10-27 19:48:43,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:43,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792700533] [2020-10-27 19:48:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:43,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:45,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:45,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 19:48:45,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:45,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2270 [2020-10-27 19:48:45,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:45,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:48:45,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:45,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 19:48:45,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:47,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:47,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:47,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:47,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:47,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792700533] [2020-10-27 19:48:47,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:47,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:48:47,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464509632] [2020-10-27 19:48:47,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:48:47,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:48:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:48:47,309 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 21 states. [2020-10-27 19:48:48,524 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-27 19:48:48,760 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-27 19:48:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:49,937 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2020-10-27 19:48:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:48:49,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-10-27 19:48:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:49,939 INFO L225 Difference]: With dead ends: 235 [2020-10-27 19:48:49,939 INFO L226 Difference]: Without dead ends: 231 [2020-10-27 19:48:49,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:48:49,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-27 19:48:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 183. [2020-10-27 19:48:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 19:48:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-10-27 19:48:49,963 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 146 [2020-10-27 19:48:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:49,963 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-10-27 19:48:49,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:48:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-10-27 19:48:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 19:48:49,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:49,965 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:49,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:48:49,965 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1508474280, now seen corresponding path program 19 times [2020-10-27 19:48:49,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:49,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095728793] [2020-10-27 19:48:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:50,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:52,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:52,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 19:48:52,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:52,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2226 [2020-10-27 19:48:52,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:52,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:48:52,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:52,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-27 19:48:52,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:53,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:53,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:53,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:53,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:53,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:53,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:53,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:53,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:53,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:53,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 28 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:53,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095728793] [2020-10-27 19:48:53,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:53,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:48:53,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631888694] [2020-10-27 19:48:53,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:48:53,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:48:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:48:53,635 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 21 states. [2020-10-27 19:48:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:56,277 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2020-10-27 19:48:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:48:56,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 153 [2020-10-27 19:48:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:56,279 INFO L225 Difference]: With dead ends: 245 [2020-10-27 19:48:56,279 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 19:48:56,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:48:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 19:48:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-27 19:48:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 19:48:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-10-27 19:48:56,297 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 153 [2020-10-27 19:48:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:56,297 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-10-27 19:48:56,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:48:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-10-27 19:48:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 19:48:56,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:56,298 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:56,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 19:48:56,298 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:56,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1848451966, now seen corresponding path program 20 times [2020-10-27 19:48:56,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:56,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339827732] [2020-10-27 19:48:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:56,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:58,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:58,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 19:48:58,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:58,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2538 [2020-10-27 19:48:58,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:48:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-27 19:48:58,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:59,899 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-10-27 19:49:00,154 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-27 19:49:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:00,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:00,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:00,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:00,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:00,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:00,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:00,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:01,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339827732] [2020-10-27 19:49:01,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:01,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 19:49:01,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193424755] [2020-10-27 19:49:01,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 19:49:01,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 19:49:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:49:01,011 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 22 states. [2020-10-27 19:49:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:03,919 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2020-10-27 19:49:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:49:03,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-10-27 19:49:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:03,921 INFO L225 Difference]: With dead ends: 253 [2020-10-27 19:49:03,922 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 19:49:03,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:49:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 19:49:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2020-10-27 19:49:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 19:49:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2020-10-27 19:49:03,946 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 154 [2020-10-27 19:49:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:03,947 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2020-10-27 19:49:03,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 19:49:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2020-10-27 19:49:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 19:49:03,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:03,948 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:03,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 19:49:03,948 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:03,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1829354446, now seen corresponding path program 21 times [2020-10-27 19:49:03,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:03,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478214516] [2020-10-27 19:49:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:04,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:07,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:07,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 19:49:07,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:07,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3096 [2020-10-27 19:49:07,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:49:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:07,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-27 19:49:07,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:08,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:08,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:08,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:08,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:08,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:08,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:09,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478214516] [2020-10-27 19:49:09,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:09,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 19:49:09,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068901312] [2020-10-27 19:49:09,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 19:49:09,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 19:49:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:49:09,215 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 22 states. [2020-10-27 19:49:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:12,072 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-27 19:49:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:49:12,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 162 [2020-10-27 19:49:12,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:12,075 INFO L225 Difference]: With dead ends: 261 [2020-10-27 19:49:12,075 INFO L226 Difference]: Without dead ends: 257 [2020-10-27 19:49:12,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:49:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-27 19:49:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 200. [2020-10-27 19:49:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 19:49:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2020-10-27 19:49:12,105 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 162 [2020-10-27 19:49:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:12,105 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2020-10-27 19:49:12,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 19:49:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2020-10-27 19:49:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 19:49:12,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:12,107 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:12,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 19:49:12,107 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash -491101412, now seen corresponding path program 22 times [2020-10-27 19:49:12,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:12,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249240649] [2020-10-27 19:49:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:12,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:15,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:15,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 19:49:15,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:15,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3221 [2020-10-27 19:49:15,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:15,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 19:49:15,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:15,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 19:49:15,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:16,393 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-27 19:49:16,633 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-27 19:49:16,866 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-27 19:49:17,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:17,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:17,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:17,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:17,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:17,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:17,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:17,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:17,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:18,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249240649] [2020-10-27 19:49:18,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:18,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 19:49:18,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818361743] [2020-10-27 19:49:18,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 19:49:18,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 19:49:18,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:49:18,031 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 23 states. [2020-10-27 19:49:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:21,136 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2020-10-27 19:49:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:49:21,136 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 163 [2020-10-27 19:49:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:21,139 INFO L225 Difference]: With dead ends: 260 [2020-10-27 19:49:21,139 INFO L226 Difference]: Without dead ends: 256 [2020-10-27 19:49:21,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:49:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-27 19:49:21,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 200. [2020-10-27 19:49:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 19:49:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2020-10-27 19:49:21,168 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 163 [2020-10-27 19:49:21,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:21,169 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2020-10-27 19:49:21,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 19:49:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2020-10-27 19:49:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 19:49:21,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:21,170 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:21,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 19:49:21,170 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1396870938, now seen corresponding path program 23 times [2020-10-27 19:49:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:21,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789092943] [2020-10-27 19:49:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:21,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:24,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:24,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 19:49:24,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3580 [2020-10-27 19:49:24,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 19:49:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-27 19:49:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:26,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:26,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:26,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:26,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:26,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:26,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:26,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:26,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 32 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:26,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789092943] [2020-10-27 19:49:26,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:26,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 19:49:26,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877928917] [2020-10-27 19:49:26,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 19:49:26,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:26,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 19:49:26,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:49:26,623 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 23 states. [2020-10-27 19:49:30,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:30,038 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2020-10-27 19:49:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:49:30,039 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 170 [2020-10-27 19:49:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:30,041 INFO L225 Difference]: With dead ends: 270 [2020-10-27 19:49:30,041 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 19:49:30,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:49:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 19:49:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-27 19:49:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 19:49:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2020-10-27 19:49:30,067 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 170 [2020-10-27 19:49:30,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:30,067 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2020-10-27 19:49:30,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 19:49:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2020-10-27 19:49:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 19:49:30,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:30,068 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:30,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 19:49:30,068 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash -365557656, now seen corresponding path program 24 times [2020-10-27 19:49:30,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:30,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806604138] [2020-10-27 19:49:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:30,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:33,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:33,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 19:49:33,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3570 [2020-10-27 19:49:33,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 19:49:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-27 19:49:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:34,842 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 19:49:35,075 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-27 19:49:35,312 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-10-27 19:49:36,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:36,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:36,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:36,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:36,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:36,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:36,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:36,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:36,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:36,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:36,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:36,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806604138] [2020-10-27 19:49:36,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:36,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 19:49:36,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374649980] [2020-10-27 19:49:36,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 19:49:36,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:36,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 19:49:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:49:36,470 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 24 states. [2020-10-27 19:49:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:40,180 INFO L93 Difference]: Finished difference Result 278 states and 281 transitions. [2020-10-27 19:49:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:49:40,181 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 171 [2020-10-27 19:49:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:40,183 INFO L225 Difference]: With dead ends: 278 [2020-10-27 19:49:40,183 INFO L226 Difference]: Without dead ends: 274 [2020-10-27 19:49:40,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 19:49:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-27 19:49:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 209. [2020-10-27 19:49:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-27 19:49:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2020-10-27 19:49:40,212 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 171 [2020-10-27 19:49:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:40,213 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2020-10-27 19:49:40,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 19:49:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2020-10-27 19:49:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 19:49:40,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:40,214 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:40,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 19:49:40,214 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:40,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1720558004, now seen corresponding path program 25 times [2020-10-27 19:49:40,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:40,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685845864] [2020-10-27 19:49:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:40,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:45,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:45,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-27 19:49:45,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:45,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4620 [2020-10-27 19:49:45,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:45,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 19:49:45,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:45,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-27 19:49:45,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:46,112 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-27 19:49:46,265 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-27 19:49:46,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:47,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:47,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:47,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:47,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:47,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:47,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:47,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:47,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685845864] [2020-10-27 19:49:47,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:47,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 19:49:47,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258452015] [2020-10-27 19:49:47,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 19:49:47,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 19:49:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:49:47,473 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 24 states. [2020-10-27 19:49:48,878 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-27 19:49:49,217 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-27 19:49:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:51,259 INFO L93 Difference]: Finished difference Result 286 states and 289 transitions. [2020-10-27 19:49:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:49:51,260 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 179 [2020-10-27 19:49:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:51,262 INFO L225 Difference]: With dead ends: 286 [2020-10-27 19:49:51,262 INFO L226 Difference]: Without dead ends: 282 [2020-10-27 19:49:51,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:49:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-27 19:49:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 217. [2020-10-27 19:49:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 19:49:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-10-27 19:49:51,296 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 179 [2020-10-27 19:49:51,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:51,296 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-10-27 19:49:51,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 19:49:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-10-27 19:49:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 19:49:51,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:51,297 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:51,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 19:49:51,298 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:51,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1078806798, now seen corresponding path program 26 times [2020-10-27 19:49:51,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:51,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919805299] [2020-10-27 19:49:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:56,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:56,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-27 19:49:56,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:56,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4668 [2020-10-27 19:49:56,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 19:49:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-27 19:49:56,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:57,307 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 19:49:57,466 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-27 19:49:58,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:58,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:58,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919805299] [2020-10-27 19:49:58,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:58,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 19:49:58,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704424109] [2020-10-27 19:49:58,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 19:49:58,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:58,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 19:49:58,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:49:58,712 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 25 states. [2020-10-27 19:50:00,875 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-27 19:50:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:02,767 INFO L93 Difference]: Finished difference Result 285 states and 287 transitions. [2020-10-27 19:50:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:50:02,768 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 180 [2020-10-27 19:50:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:02,770 INFO L225 Difference]: With dead ends: 285 [2020-10-27 19:50:02,770 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 19:50:02,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 19:50:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 19:50:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 217. [2020-10-27 19:50:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 19:50:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-10-27 19:50:02,807 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 180 [2020-10-27 19:50:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:02,808 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-10-27 19:50:02,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 19:50:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-10-27 19:50:02,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-27 19:50:02,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:02,809 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:02,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 19:50:02,810 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2037567744, now seen corresponding path program 27 times [2020-10-27 19:50:02,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:02,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854340353] [2020-10-27 19:50:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:03,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:07,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:07,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 19:50:07,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:07,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 19:50:07,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 19:50:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-27 19:50:07,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:08,925 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-27 19:50:10,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:10,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:10,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:10,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:10,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:10,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:10,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:10,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:10,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 36 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:10,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854340353] [2020-10-27 19:50:10,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:10,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 19:50:10,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357102285] [2020-10-27 19:50:10,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 19:50:10,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:10,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 19:50:10,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:50:10,570 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 25 states. [2020-10-27 19:50:12,605 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-27 19:50:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:14,877 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2020-10-27 19:50:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:50:14,877 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 187 [2020-10-27 19:50:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:14,879 INFO L225 Difference]: With dead ends: 295 [2020-10-27 19:50:14,879 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 19:50:14,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:50:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 19:50:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-10-27 19:50:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 19:50:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2020-10-27 19:50:14,905 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2020-10-27 19:50:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:14,905 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2020-10-27 19:50:14,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 19:50:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2020-10-27 19:50:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-27 19:50:14,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:14,907 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:14,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 19:50:14,907 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:14,907 INFO L82 PathProgramCache]: Analyzing trace with hash -171647910, now seen corresponding path program 28 times [2020-10-27 19:50:14,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:14,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236504197] [2020-10-27 19:50:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:20,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:20,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 19:50:20,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:20,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5139 [2020-10-27 19:50:20,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:20,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 19:50:20,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:20,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-27 19:50:20,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:21,342 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-27 19:50:21,533 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-27 19:50:21,911 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-10-27 19:50:22,204 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-10-27 19:50:22,475 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2020-10-27 19:50:22,634 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-10-27 19:50:23,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:23,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:23,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:23,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:23,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:23,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:50:23,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:23,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:23,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:23,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:23,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 0 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236504197] [2020-10-27 19:50:23,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:23,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 19:50:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051911201] [2020-10-27 19:50:23,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 19:50:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 19:50:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:50:23,948 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 26 states. [2020-10-27 19:50:26,128 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-27 19:50:26,832 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-27 19:50:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:28,753 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2020-10-27 19:50:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 19:50:28,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 188 [2020-10-27 19:50:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:28,755 INFO L225 Difference]: With dead ends: 303 [2020-10-27 19:50:28,755 INFO L226 Difference]: Without dead ends: 299 [2020-10-27 19:50:28,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=134, Invalid=1758, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:50:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-27 19:50:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 226. [2020-10-27 19:50:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-27 19:50:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2020-10-27 19:50:28,785 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 188 [2020-10-27 19:50:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:28,786 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2020-10-27 19:50:28,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 19:50:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2020-10-27 19:50:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-27 19:50:28,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:28,787 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:28,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 19:50:28,788 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:28,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1807064154, now seen corresponding path program 29 times [2020-10-27 19:50:28,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:28,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617861196] [2020-10-27 19:50:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:29,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:34,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:34,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 19:50:34,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:34,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 19:50:34,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:34,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 19:50:34,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:34,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-27 19:50:34,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:35,420 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-27 19:50:35,770 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-27 19:50:35,930 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-27 19:50:36,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:36,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:36,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:36,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:36,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:36,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:50:36,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:36,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:36,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:37,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617861196] [2020-10-27 19:50:37,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:37,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 19:50:37,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594518283] [2020-10-27 19:50:37,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 19:50:37,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:37,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 19:50:37,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:50:37,389 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 26 states. [2020-10-27 19:50:39,495 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-27 19:50:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:41,948 INFO L93 Difference]: Finished difference Result 311 states and 314 transitions. [2020-10-27 19:50:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:50:41,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 196 [2020-10-27 19:50:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:41,952 INFO L225 Difference]: With dead ends: 311 [2020-10-27 19:50:41,952 INFO L226 Difference]: Without dead ends: 307 [2020-10-27 19:50:41,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 19:50:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-27 19:50:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 234. [2020-10-27 19:50:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 19:50:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2020-10-27 19:50:41,993 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 196 [2020-10-27 19:50:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:41,993 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2020-10-27 19:50:41,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 19:50:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2020-10-27 19:50:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 19:50:41,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:41,995 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:41,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 19:50:41,995 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:41,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1615971212, now seen corresponding path program 30 times [2020-10-27 19:50:41,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:41,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952455067] [2020-10-27 19:50:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:42,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:47,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:47,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 19:50:47,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:47,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5190 [2020-10-27 19:50:47,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 19:50:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-27 19:50:47,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:48,956 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2020-10-27 19:50:49,249 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 107 [2020-10-27 19:50:49,427 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 19:50:50,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:50,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:50,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:50,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:50,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:50,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:50:50,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:50,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:51,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952455067] [2020-10-27 19:50:51,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:51,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 19:50:51,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719962692] [2020-10-27 19:50:51,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 19:50:51,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 19:50:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:50:51,041 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand 27 states. [2020-10-27 19:50:53,707 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 19:50:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:55,954 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2020-10-27 19:50:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 19:50:55,955 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 197 [2020-10-27 19:50:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:55,957 INFO L225 Difference]: With dead ends: 310 [2020-10-27 19:50:55,957 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 19:50:55,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=132, Invalid=1760, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:50:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 19:50:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 234. [2020-10-27 19:50:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 19:50:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2020-10-27 19:50:55,987 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 197 [2020-10-27 19:50:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:55,987 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2020-10-27 19:50:55,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 19:50:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2020-10-27 19:50:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-27 19:50:55,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:55,988 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:55,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 19:50:55,989 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:55,989 INFO L82 PathProgramCache]: Analyzing trace with hash -123085070, now seen corresponding path program 31 times [2020-10-27 19:50:55,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:55,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030067584] [2020-10-27 19:50:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:56,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking...