/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-reverse_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:49:12,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:49:12,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:49:12,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:49:12,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:49:12,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:49:12,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:49:12,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:49:12,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:49:12,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:49:12,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:49:12,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:49:12,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:49:12,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:49:12,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:49:12,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:49:12,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:49:12,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:49:12,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:49:12,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:49:12,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:49:12,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:49:12,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:49:12,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:49:12,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:49:12,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:49:12,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:49:12,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:49:12,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:49:12,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:49:12,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:49:12,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:49:12,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:49:12,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:49:12,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:49:12,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:49:12,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:49:12,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:49:12,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:49:12,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:49:12,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:49:12,908 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 19:49:12,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:49:12,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:49:12,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:49:12,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:49:12,939 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:49:12,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:49:12,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:49:12,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:49:12,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:49:12,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:49:12,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:49:12,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:49:12,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:49:12,942 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:49:12,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:49:12,942 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:49:12,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:49:12,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:49:12,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:49:12,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:49:12,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:49:12,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:49:12,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:49:12,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:49:12,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:49:12,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:49:12,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:49:12,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:49:12,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:49:12,946 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:49:13,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:49:13,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:49:13,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:49:13,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:49:13,370 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:49:13,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple.i [2020-10-27 19:49:13,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84092dc46/8a792bdb11a1488b8e5f19b5405e4df4/FLAG5d6885461 [2020-10-27 19:49:14,186 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:49:14,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-reverse_simple.i [2020-10-27 19:49:14,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84092dc46/8a792bdb11a1488b8e5f19b5405e4df4/FLAG5d6885461 [2020-10-27 19:49:14,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84092dc46/8a792bdb11a1488b8e5f19b5405e4df4 [2020-10-27 19:49:14,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:49:14,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:49:14,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:49:14,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:49:14,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:49:14,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:49:14" (1/1) ... [2020-10-27 19:49:14,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5350e4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:14, skipping insertion in model container [2020-10-27 19:49:14,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:49:14" (1/1) ... [2020-10-27 19:49:14,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:49:14,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:49:14,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:49:14,966 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:49:15,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:49:15,087 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:49:15,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15 WrapperNode [2020-10-27 19:49:15,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:49:15,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:49:15,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:49:15,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:49:15,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (1/1) ... [2020-10-27 19:49:15,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (1/1) ... [2020-10-27 19:49:15,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (1/1) ... [2020-10-27 19:49:15,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (1/1) ... [2020-10-27 19:49:15,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (1/1) ... [2020-10-27 19:49:15,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (1/1) ... [2020-10-27 19:49:15,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (1/1) ... [2020-10-27 19:49:15,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:49:15,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:49:15,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:49:15,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:49:15,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (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 19:49:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:49:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:49:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:49:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:49:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:49:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:49:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:49:15,326 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:49:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:49:15,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:49:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:49:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:49:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:49:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:49:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:49:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:49:15,329 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:49:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:49:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:49:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:49:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:49:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:49:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:49:15,330 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:49:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:49:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:49:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:49:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:49:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:49:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:49:15,331 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:49:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:49:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:49:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:49:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:49:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:49:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:49:15,332 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:49:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:49:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:49:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:49:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:49:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:49:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:49:15,333 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:49:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:49:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:49:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:49:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:49:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:49:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:49:15,334 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:49:15,335 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:49:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:49:15,336 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:49:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:49:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:49:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:49:15,337 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:49:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:49:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:49:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:49:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:49:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:49:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:49:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:49:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:49:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:49:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:49:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:49:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:49:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:49:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:49:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:49:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:49:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:49:15,342 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:49:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:49:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:49:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:49:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:49:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:49:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:49:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:49:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:49:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:49:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:49:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:49:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:49:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:49:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:49:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:49:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:49:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:49:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:49:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:49:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:49:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:49:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:49:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:49:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:49:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:49:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:49:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:49:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:49:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:49:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:49:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:49:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:49:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:49:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:49:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:49:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:49:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:49:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:49:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:49:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:49:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:49:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:49:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:49:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:49:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:49:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:49:16,013 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:49:16,014 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 19:49:16,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:49:16 BoogieIcfgContainer [2020-10-27 19:49:16,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:49:16,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:49:16,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:49:16,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:49:16,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:49:14" (1/3) ... [2020-10-27 19:49:16,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd98a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:49:16, skipping insertion in model container [2020-10-27 19:49:16,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:49:15" (2/3) ... [2020-10-27 19:49:16,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd98a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:49:16, skipping insertion in model container [2020-10-27 19:49:16,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:49:16" (3/3) ... [2020-10-27 19:49:16,026 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2020-10-27 19:49:16,042 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:49:16,048 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:49:16,065 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:49:16,098 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:49:16,098 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:49:16,098 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:49:16,098 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:49:16,099 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:49:16,099 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:49:16,099 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:49:16,099 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:49:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-27 19:49:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:49:16,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:16,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:16,133 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:16,141 INFO L82 PathProgramCache]: Analyzing trace with hash 345412413, now seen corresponding path program 1 times [2020-10-27 19:49:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:16,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403134849] [2020-10-27 19:49:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:16,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:16,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:16,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:16,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:16,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:49:16,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:49:16,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-27 19:49:16,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:16,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:49:16,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:16,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:49:16,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:16,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:16,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:16,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:16,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:16,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 19:49:16,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:16,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:16,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:16,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:16,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:49:16,817 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 19:49:16,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403134849] [2020-10-27 19:49:16,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:49:16,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:49:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611326104] [2020-10-27 19:49:16,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:49:16,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:16,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:49:16,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:49:16,857 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-27 19:49:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:17,053 INFO L93 Difference]: Finished difference Result 81 states and 130 transitions. [2020-10-27 19:49:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:49:17,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 19:49:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:17,064 INFO L225 Difference]: With dead ends: 81 [2020-10-27 19:49:17,064 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 19:49:17,068 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 19:49:17,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 19:49:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 19:49:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 19:49:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-10-27 19:49:17,111 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 13 [2020-10-27 19:49:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:17,111 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-10-27 19:49:17,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:49:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-10-27 19:49:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:49:17,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:17,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:17,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:49:17,113 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash -99622447, now seen corresponding path program 1 times [2020-10-27 19:49:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:17,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459718784] [2020-10-27 19:49:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:17,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:17,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:17,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:17,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:49:17,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:17,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 19:49:17,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:49:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:49:17,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:17,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:17,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:17,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:17,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:17,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:17,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:49:17,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:17,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:17,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:17,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:17,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:17,427 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 19:49:17,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459718784] [2020-10-27 19:49:17,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:49:17,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:49:17,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866839694] [2020-10-27 19:49:17,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:49:17,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:17,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:49:17,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:49:17,431 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-10-27 19:49:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:17,630 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2020-10-27 19:49:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:49:17,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 19:49:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:17,632 INFO L225 Difference]: With dead ends: 61 [2020-10-27 19:49:17,632 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:49:17,633 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 19:49:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:49:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-27 19:49:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 19:49:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-10-27 19:49:17,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2020-10-27 19:49:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:17,645 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-10-27 19:49:17,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:49:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-10-27 19:49:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:49:17,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:17,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:17,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:49:17,647 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash -693165697, now seen corresponding path program 1 times [2020-10-27 19:49:17,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:17,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990090207] [2020-10-27 19:49:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:17,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:17,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:18,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:49:18,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:18,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-27 19:49:18,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:49:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:49:18,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:49:18,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:18,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:18,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:18,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:18,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:49:18,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:18,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:18,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:18,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:18,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990090207] [2020-10-27 19:49:18,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:18,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:49:18,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54633279] [2020-10-27 19:49:18,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:49:18,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:18,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:49:18,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:49:18,208 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 6 states. [2020-10-27 19:49:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:18,467 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2020-10-27 19:49:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:49:18,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 19:49:18,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:18,470 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:49:18,470 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:49:18,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:49:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:49:18,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2020-10-27 19:49:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 19:49:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-27 19:49:18,479 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2020-10-27 19:49:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:18,480 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-27 19:49:18,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:49:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-27 19:49:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:49:18,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:18,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:18,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:49:18,481 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1228587689, now seen corresponding path program 1 times [2020-10-27 19:49:18,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:18,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706278699] [2020-10-27 19:49:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:19,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:20,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:20,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:49:20,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:49:20,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2308 [2020-10-27 19:49:20,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:20,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:49:20,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:49:20,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 19:49:20,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:20,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:20,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:20,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:20,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:20,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:20,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:49:20,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:20,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:49:20,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706278699] [2020-10-27 19:49:20,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:49:20,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:49:20,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362426635] [2020-10-27 19:49:20,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:49:20,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:49:20,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:49:20,939 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2020-10-27 19:49:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:21,135 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-27 19:49:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:49:21,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-27 19:49:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:21,136 INFO L225 Difference]: With dead ends: 54 [2020-10-27 19:49:21,137 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 19:49:21,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:49:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 19:49:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 19:49:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:49:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-27 19:49:21,144 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2020-10-27 19:49:21,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:21,145 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-27 19:49:21,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:49:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-27 19:49:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:49:21,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:21,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:21,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:49:21,147 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:21,147 INFO L82 PathProgramCache]: Analyzing trace with hash -527523111, now seen corresponding path program 1 times [2020-10-27 19:49:21,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:21,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161580885] [2020-10-27 19:49:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:21,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:21,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:21,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:22,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:22,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:49:22,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:49:22,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-27 19:49:22,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:22,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:49:22,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:49:22,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:49:22,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:22,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:22,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:22,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:22,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:22,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:22,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:49:22,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:22,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:22,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:22,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:22,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:22,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161580885] [2020-10-27 19:49:22,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:22,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:49:22,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321555604] [2020-10-27 19:49:22,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:49:22,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:49:22,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:49:22,400 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 11 states. [2020-10-27 19:49:23,418 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-27 19:49:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:23,759 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-10-27 19:49:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:49:23,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 19:49:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:23,765 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:49:23,765 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 19:49:23,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:49:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 19:49:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 58. [2020-10-27 19:49:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 19:49:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2020-10-27 19:49:23,777 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 26 [2020-10-27 19:49:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:23,778 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2020-10-27 19:49:23,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:49:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2020-10-27 19:49:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:49:23,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:23,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:23,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:49:23,780 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:23,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2045311253, now seen corresponding path program 1 times [2020-10-27 19:49:23,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:23,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679201854] [2020-10-27 19:49:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:23,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:24,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:24,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:24,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:49:24,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:49:24,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-27 19:49:24,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:49:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:49:24,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:49:24,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:24,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:24,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:24,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:24,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:49:24,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:24,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:24,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:49:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:24,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679201854] [2020-10-27 19:49:24,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:24,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:49:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589745910] [2020-10-27 19:49:24,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:49:24,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:24,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:49:24,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:49:24,770 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 11 states. [2020-10-27 19:49:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:25,288 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-27 19:49:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:49:25,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 19:49:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:25,290 INFO L225 Difference]: With dead ends: 96 [2020-10-27 19:49:25,291 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 19:49:25,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:49:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 19:49:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-27 19:49:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 19:49:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2020-10-27 19:49:25,301 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 26 [2020-10-27 19:49:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:25,302 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2020-10-27 19:49:25,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:49:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2020-10-27 19:49:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:49:25,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:25,303 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] [2020-10-27 19:49:25,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:49:25,304 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash 147695768, now seen corresponding path program 2 times [2020-10-27 19:49:25,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:25,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631806645] [2020-10-27 19:49:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:25,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:25,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:49:25,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:25,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 19:49:25,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:49:25,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:25,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:49:25,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:25,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:25,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:25,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:25,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:25,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:25,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:49:25,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:25,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:25,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:49:25,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631806645] [2020-10-27 19:49:25,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:49:25,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:49:25,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098259015] [2020-10-27 19:49:25,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:49:25,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:49:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:49:25,735 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 6 states. [2020-10-27 19:49:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:25,940 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-10-27 19:49:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:49:25,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 19:49:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:25,942 INFO L225 Difference]: With dead ends: 111 [2020-10-27 19:49:25,942 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 19:49:25,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:49:25,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 19:49:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-27 19:49:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 19:49:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-10-27 19:49:25,958 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 27 [2020-10-27 19:49:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:25,958 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-10-27 19:49:25,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:49:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-10-27 19:49:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:49:25,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:25,960 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] [2020-10-27 19:49:25,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:49:25,960 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1698817572, now seen corresponding path program 2 times [2020-10-27 19:49:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:25,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864114223] [2020-10-27 19:49:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:26,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:26,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:49:26,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:26,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 19:49:26,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:26,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:49:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:49:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:26,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:26,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:26,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:26,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:26,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:26,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:26,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:26,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:26,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:26,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864114223] [2020-10-27 19:49:26,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:26,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:49:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92778689] [2020-10-27 19:49:26,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:49:26,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:26,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:49:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:49:26,552 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 12 states. [2020-10-27 19:49:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:27,149 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2020-10-27 19:49:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:49:27,149 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 19:49:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:27,150 INFO L225 Difference]: With dead ends: 105 [2020-10-27 19:49:27,151 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 19:49:27,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:49:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 19:49:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2020-10-27 19:49:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 19:49:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-10-27 19:49:27,178 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 27 [2020-10-27 19:49:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:27,178 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-10-27 19:49:27,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:49:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-10-27 19:49:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:49:27,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:27,180 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] [2020-10-27 19:49:27,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:49:27,180 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1696970530, now seen corresponding path program 1 times [2020-10-27 19:49:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:27,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805004338] [2020-10-27 19:49:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:27,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:27,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:27,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:27,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:49:27,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:27,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-27 19:49:27,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:27,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:49:27,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 19:49:27,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:49:27,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:27,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:27,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:27,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:27,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:27,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:27,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:27,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:27,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:49:27,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805004338] [2020-10-27 19:49:27,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:49:27,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:49:27,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350284424] [2020-10-27 19:49:27,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:49:27,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:27,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:49:27,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:49:27,559 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 4 states. [2020-10-27 19:49:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:27,643 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2020-10-27 19:49:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:49:27,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 19:49:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:27,645 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:49:27,645 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 19:49:27,646 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 19:49:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 19:49:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-27 19:49:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 19:49:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-10-27 19:49:27,655 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 27 [2020-10-27 19:49:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:27,656 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-10-27 19:49:27,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:49:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-10-27 19:49:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:49:27,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:27,657 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:27,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:49:27,658 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:27,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1802694155, now seen corresponding path program 3 times [2020-10-27 19:49:27,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:27,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727237721] [2020-10-27 19:49:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:27,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:27,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:27,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:49:27,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:27,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 19:49:27,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:49:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:49:27,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:27,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:28,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:28,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:28,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:28,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:49:28,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:28,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:28,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:28,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727237721] [2020-10-27 19:49:28,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:28,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:49:28,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834093253] [2020-10-27 19:49:28,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:49:28,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:49:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:49:28,008 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 9 states. [2020-10-27 19:49:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:28,642 INFO L93 Difference]: Finished difference Result 166 states and 209 transitions. [2020-10-27 19:49:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:49:28,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-27 19:49:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:28,645 INFO L225 Difference]: With dead ends: 166 [2020-10-27 19:49:28,645 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 19:49:28,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:28,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 19:49:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2020-10-27 19:49:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 19:49:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2020-10-27 19:49:28,659 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 28 [2020-10-27 19:49:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:28,659 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2020-10-27 19:49:28,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:49:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2020-10-27 19:49:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:49:28,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:28,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:28,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:49:28,662 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1487828979, now seen corresponding path program 1 times [2020-10-27 19:49:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:28,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376172436] [2020-10-27 19:49:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:28,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:29,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:29,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:49:29,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-27 19:49:29,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:49:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:29,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:49:29,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:29,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:29,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:29,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:29,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:29,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:29,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376172436] [2020-10-27 19:49:29,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:29,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:49:29,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298089066] [2020-10-27 19:49:29,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:49:29,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:49:29,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:49:29,463 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand 13 states. [2020-10-27 19:49:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:29,974 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2020-10-27 19:49:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:49:29,974 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-27 19:49:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:29,977 INFO L225 Difference]: With dead ends: 142 [2020-10-27 19:49:29,977 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 19:49:29,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:49:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 19:49:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 98. [2020-10-27 19:49:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:49:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-10-27 19:49:30,000 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 29 [2020-10-27 19:49:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:30,005 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-10-27 19:49:30,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:49:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-10-27 19:49:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:49:30,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:30,007 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:49:30,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:49:30,007 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:30,008 INFO L82 PathProgramCache]: Analyzing trace with hash 386573699, now seen corresponding path program 2 times [2020-10-27 19:49:30,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:30,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133465467] [2020-10-27 19:49:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:30,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:30,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:30,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:30,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:49:30,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:30,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-27 19:49:30,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:30,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:49:30,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:30,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:49:30,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:31,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:31,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:31,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:31,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:31,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:31,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:31,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:31,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:31,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:31,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133465467] [2020-10-27 19:49:31,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:31,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:49:31,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91937647] [2020-10-27 19:49:31,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:49:31,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:31,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:49:31,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:49:31,379 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 13 states. [2020-10-27 19:49:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:32,664 INFO L93 Difference]: Finished difference Result 215 states and 265 transitions. [2020-10-27 19:49:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:49:32,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 19:49:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:32,667 INFO L225 Difference]: With dead ends: 215 [2020-10-27 19:49:32,667 INFO L226 Difference]: Without dead ends: 203 [2020-10-27 19:49:32,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:49:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-27 19:49:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 118. [2020-10-27 19:49:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 19:49:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2020-10-27 19:49:32,694 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 32 [2020-10-27 19:49:32,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:32,694 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2020-10-27 19:49:32,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:49:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2020-10-27 19:49:32,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:49:32,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:32,696 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] [2020-10-27 19:49:32,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:49:32,696 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2065034576, now seen corresponding path program 1 times [2020-10-27 19:49:32,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:32,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361282958] [2020-10-27 19:49:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:32,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:32,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:33,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:33,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:49:33,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:49:33,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1049 [2020-10-27 19:49:33,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:33,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:49:33,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 19:49:33,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:49:33,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:33,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:33,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:33,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:33,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:33,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:49:33,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:33,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:49:33,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361282958] [2020-10-27 19:49:33,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:49:33,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:49:33,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882249479] [2020-10-27 19:49:33,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:49:33,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:33,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:49:33,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:49:33,858 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 6 states. [2020-10-27 19:49:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:34,059 INFO L93 Difference]: Finished difference Result 135 states and 169 transitions. [2020-10-27 19:49:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:49:34,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 19:49:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:34,061 INFO L225 Difference]: With dead ends: 135 [2020-10-27 19:49:34,061 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 19:49:34,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:49:34,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 19:49:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 19:49:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:49:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2020-10-27 19:49:34,075 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 33 [2020-10-27 19:49:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:34,076 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2020-10-27 19:49:34,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:49:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2020-10-27 19:49:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:49:34,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:34,078 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] [2020-10-27 19:49:34,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:49:34,079 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1255687950, now seen corresponding path program 1 times [2020-10-27 19:49:34,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:34,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91580546] [2020-10-27 19:49:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:34,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:34,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:34,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:34,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:49:34,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:34,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-27 19:49:34,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:34,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:49:34,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:49:34,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:49:34,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:34,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:34,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:34,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:34,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:34,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:34,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:34,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:34,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:34,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:34,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91580546] [2020-10-27 19:49:34,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:34,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:49:34,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036815325] [2020-10-27 19:49:34,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:49:34,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:34,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:49:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:49:34,689 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand 7 states. [2020-10-27 19:49:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:34,925 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2020-10-27 19:49:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:49:34,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-27 19:49:34,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:34,927 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:49:34,927 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 19:49:34,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:49:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 19:49:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 130. [2020-10-27 19:49:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 19:49:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2020-10-27 19:49:34,940 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 33 [2020-10-27 19:49:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:34,940 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2020-10-27 19:49:34,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:49:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2020-10-27 19:49:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:49:34,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:34,941 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:34,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:49:34,941 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:34,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:34,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1580074194, now seen corresponding path program 3 times [2020-10-27 19:49:34,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:34,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299669414] [2020-10-27 19:49:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:34,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:35,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:35,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:49:35,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:35,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-27 19:49:35,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:35,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:49:35,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:35,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:49:35,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:36,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:36,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:36,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:36,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:36,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:36,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:36,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:36,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:36,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:36,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:36,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:36,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299669414] [2020-10-27 19:49:36,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:36,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:49:36,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701280860] [2020-10-27 19:49:36,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:49:36,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:36,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:49:36,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:49:36,061 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand 13 states. [2020-10-27 19:49:36,608 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-27 19:49:37,076 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-27 19:49:37,503 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-27 19:49:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:37,673 INFO L93 Difference]: Finished difference Result 185 states and 225 transitions. [2020-10-27 19:49:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:49:37,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:49:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:37,675 INFO L225 Difference]: With dead ends: 185 [2020-10-27 19:49:37,675 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 19:49:37,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:49:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 19:49:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 143. [2020-10-27 19:49:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 19:49:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2020-10-27 19:49:37,693 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 33 [2020-10-27 19:49:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:37,695 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2020-10-27 19:49:37,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:49:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2020-10-27 19:49:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:49:37,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:37,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:37,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:49:37,697 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:37,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2031918101, now seen corresponding path program 1 times [2020-10-27 19:49:37,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:37,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135810839] [2020-10-27 19:49:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:37,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:37,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:38,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:38,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:38,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:38,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:42,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:42,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:49:42,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 19:49:42,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4492 [2020-10-27 19:49:42,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:42,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:49:42,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:49:42,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:49:42,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:42,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:42,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:42,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:42,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:42,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:42,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:42,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:42,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:42,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:42,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135810839] [2020-10-27 19:49:42,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:42,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:49:42,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679758833] [2020-10-27 19:49:42,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:49:42,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:49:42,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:49:42,482 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand 12 states. [2020-10-27 19:49:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:43,373 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2020-10-27 19:49:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:49:43,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 19:49:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:43,375 INFO L225 Difference]: With dead ends: 222 [2020-10-27 19:49:43,375 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 19:49:43,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:49:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 19:49:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 163. [2020-10-27 19:49:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 19:49:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 202 transitions. [2020-10-27 19:49:43,395 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 202 transitions. Word has length 34 [2020-10-27 19:49:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:43,395 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 202 transitions. [2020-10-27 19:49:43,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:49:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 202 transitions. [2020-10-27 19:49:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:49:43,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:43,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:43,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:49:43,398 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1453702569, now seen corresponding path program 1 times [2020-10-27 19:49:43,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:43,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545694364] [2020-10-27 19:49:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:43,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:43,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:43,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:43,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:44,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:46,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:46,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:49:46,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:49:46,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3134 [2020-10-27 19:49:46,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:49:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 19:49:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:49:46,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:46,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:46,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:46,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:46,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:46,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:46,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:46,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:46,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:46,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:46,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:49:46,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545694364] [2020-10-27 19:49:46,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:49:46,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:49:46,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060560174] [2020-10-27 19:49:46,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:49:46,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:46,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:49:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:49:46,621 INFO L87 Difference]: Start difference. First operand 163 states and 202 transitions. Second operand 7 states. [2020-10-27 19:49:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:46,889 INFO L93 Difference]: Finished difference Result 193 states and 235 transitions. [2020-10-27 19:49:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:49:46,892 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-27 19:49:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:46,894 INFO L225 Difference]: With dead ends: 193 [2020-10-27 19:49:46,894 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 19:49:46,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:49:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 19:49:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2020-10-27 19:49:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 19:49:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 195 transitions. [2020-10-27 19:49:46,912 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 195 transitions. Word has length 34 [2020-10-27 19:49:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:46,912 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 195 transitions. [2020-10-27 19:49:46,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:49:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 195 transitions. [2020-10-27 19:49:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:49:46,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:46,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:46,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:49:46,914 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:46,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1711868007, now seen corresponding path program 2 times [2020-10-27 19:49:46,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:46,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691054140] [2020-10-27 19:49:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:46,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:48,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:48,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:49:48,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:49:48,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2053 [2020-10-27 19:49:48,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:48,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:49:48,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:48,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:49:48,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:49,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:49,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:49,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:49,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:49,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:49,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:49:49,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691054140] [2020-10-27 19:49:49,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:49,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:49:49,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137772460] [2020-10-27 19:49:49,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:49:49,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:49,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:49:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:49:49,194 INFO L87 Difference]: Start difference. First operand 159 states and 195 transitions. Second operand 11 states. [2020-10-27 19:49:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:49,714 INFO L93 Difference]: Finished difference Result 222 states and 265 transitions. [2020-10-27 19:49:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:49:49,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 19:49:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:49,717 INFO L225 Difference]: With dead ends: 222 [2020-10-27 19:49:49,717 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 19:49:49,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:49:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 19:49:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 166. [2020-10-27 19:49:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 19:49:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2020-10-27 19:49:49,739 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 34 [2020-10-27 19:49:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:49,739 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2020-10-27 19:49:49,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:49:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2020-10-27 19:49:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:49:49,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:49,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:49,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:49:49,742 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:49,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1334955380, now seen corresponding path program 1 times [2020-10-27 19:49:49,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:49,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178969503] [2020-10-27 19:49:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:49,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:49,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:50,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:50,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:49:50,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:50,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-27 19:49:50,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:49:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:49:50,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:50,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:50,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:50,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:50,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:50,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:50,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:50,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:49:50,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178969503] [2020-10-27 19:49:50,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:50,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:49:50,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020583431] [2020-10-27 19:49:50,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:49:50,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:50,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:49:50,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:49:50,574 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand 8 states. [2020-10-27 19:49:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:50,978 INFO L93 Difference]: Finished difference Result 210 states and 252 transitions. [2020-10-27 19:49:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:49:50,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 19:49:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:50,980 INFO L225 Difference]: With dead ends: 210 [2020-10-27 19:49:50,980 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 19:49:50,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:49:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 19:49:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-27 19:49:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 19:49:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 188 transitions. [2020-10-27 19:49:50,993 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 188 transitions. Word has length 34 [2020-10-27 19:49:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:50,994 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 188 transitions. [2020-10-27 19:49:50,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:49:50,994 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 188 transitions. [2020-10-27 19:49:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:49:50,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:50,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:50,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:49:50,995 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:50,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1237878984, now seen corresponding path program 1 times [2020-10-27 19:49:50,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:50,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771791140] [2020-10-27 19:49:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:51,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:51,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:51,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:51,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:52,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:52,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:49:52,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:49:52,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1235 [2020-10-27 19:49:52,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:52,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:49:52,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:52,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:49:52,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:52,552 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-27 19:49:52,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:52,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:52,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:52,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:52,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:52,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:52,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:52,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:49:52,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771791140] [2020-10-27 19:49:52,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:52,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:49:52,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210261829] [2020-10-27 19:49:52,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:49:52,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:52,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:49:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:49:52,811 INFO L87 Difference]: Start difference. First operand 156 states and 188 transitions. Second operand 12 states. [2020-10-27 19:49:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:53,449 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2020-10-27 19:49:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:49:53,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 19:49:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:53,454 INFO L225 Difference]: With dead ends: 187 [2020-10-27 19:49:53,454 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 19:49:53,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:49:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 19:49:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-27 19:49:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 19:49:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 191 transitions. [2020-10-27 19:49:53,469 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 191 transitions. Word has length 34 [2020-10-27 19:49:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:53,469 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 191 transitions. [2020-10-27 19:49:53,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:49:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 191 transitions. [2020-10-27 19:49:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:49:53,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:53,470 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:49:53,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:49:53,470 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1986251000, now seen corresponding path program 4 times [2020-10-27 19:49:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:53,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931567] [2020-10-27 19:49:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:53,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:54,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2460 [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:49:55,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:56,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:56,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:56,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:56,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:56,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:56,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:56,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:56,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:56,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:56,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:56,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:56,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931567] [2020-10-27 19:49:56,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:56,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:49:56,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934552037] [2020-10-27 19:49:56,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:49:56,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:56,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:49:56,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:49:56,587 INFO L87 Difference]: Start difference. First operand 159 states and 191 transitions. Second operand 14 states. [2020-10-27 19:49:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:58,009 INFO L93 Difference]: Finished difference Result 308 states and 372 transitions. [2020-10-27 19:49:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:49:58,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 19:49:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:58,012 INFO L225 Difference]: With dead ends: 308 [2020-10-27 19:49:58,012 INFO L226 Difference]: Without dead ends: 275 [2020-10-27 19:49:58,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:49:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-27 19:49:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 179. [2020-10-27 19:49:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 19:49:58,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 216 transitions. [2020-10-27 19:49:58,029 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 216 transitions. Word has length 34 [2020-10-27 19:49:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:58,029 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 216 transitions. [2020-10-27 19:49:58,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:49:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 216 transitions. [2020-10-27 19:49:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:49:58,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:58,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:58,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:49:58,031 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash -959414135, now seen corresponding path program 2 times [2020-10-27 19:49:58,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:58,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385605851] [2020-10-27 19:49:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:58,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:58,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:58,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:49:58,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:49:58,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-27 19:49:58,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:58,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:49:58,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:58,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:49:58,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:59,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:59,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:59,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:59,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:59,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:59,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:59,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:59,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:59,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385605851] [2020-10-27 19:49:59,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:59,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:49:59,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624230845] [2020-10-27 19:49:59,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:49:59,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:49:59,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:49:59,234 INFO L87 Difference]: Start difference. First operand 179 states and 216 transitions. Second operand 14 states. [2020-10-27 19:50:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:00,171 INFO L93 Difference]: Finished difference Result 238 states and 284 transitions. [2020-10-27 19:50:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:50:00,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 19:50:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:00,175 INFO L225 Difference]: With dead ends: 238 [2020-10-27 19:50:00,175 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 19:50:00,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:50:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 19:50:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 183. [2020-10-27 19:50:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 19:50:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 221 transitions. [2020-10-27 19:50:00,193 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 221 transitions. Word has length 35 [2020-10-27 19:50:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:00,193 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 221 transitions. [2020-10-27 19:50:00,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:50:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 221 transitions. [2020-10-27 19:50:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:50:00,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:00,194 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:00,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:50:00,194 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2123195831, now seen corresponding path program 5 times [2020-10-27 19:50:00,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:00,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67065731] [2020-10-27 19:50:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:01,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:01,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:50:01,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:50:01,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-10-27 19:50:01,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:01,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:50:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:50:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:01,936 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 23: A-local: [(main_~prev~0.offset_25 Int), (main_~x~0.offset_25 Int), (main_~x~0.base_25 Int), (|#memory_$Pointer$.offset_25| (Array Int (Array Int Int)))], B-local: []. [2020-10-27 19:50:01,937 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 24: A-local: [(main_~prev~0.offset_25 Int), (main_~x~0.offset_25 Int), (main_~x~0.base_25 Int), (|#memory_$Pointer$.offset_25| (Array Int (Array Int Int)))], B-local: []. [2020-10-27 19:50:01,938 ERROR L253 erpolLogProxyWrapper]: Interpolant 25 not inductive [2020-10-27 19:50:01,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:50:01,939 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 19:50:01,945 INFO L168 Benchmark]: Toolchain (without parser) took 47438.58 ms. Allocated memory was 151.0 MB in the beginning and 653.3 MB in the end (delta: 502.3 MB). Free memory was 125.3 MB in the beginning and 260.9 MB in the end (delta: -135.5 MB). Peak memory consumption was 368.6 MB. Max. memory is 8.0 GB. [2020-10-27 19:50:01,945 INFO L168 Benchmark]: CDTParser took 1.62 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 118.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:50:01,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 573.81 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 102.5 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:50:01,946 INFO L168 Benchmark]: Boogie Preprocessor took 135.71 ms. Allocated memory is still 151.0 MB. Free memory was 102.5 MB in the beginning and 133.8 MB in the end (delta: -31.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2020-10-27 19:50:01,947 INFO L168 Benchmark]: RCFGBuilder took 789.11 ms. Allocated memory is still 151.0 MB. Free memory was 133.8 MB in the beginning and 88.4 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:50:01,947 INFO L168 Benchmark]: TraceAbstraction took 45925.62 ms. Allocated memory was 151.0 MB in the beginning and 653.3 MB in the end (delta: 502.3 MB). Free memory was 87.9 MB in the beginning and 260.9 MB in the end (delta: -173.0 MB). Peak memory consumption was 329.8 MB. Max. memory is 8.0 GB. [2020-10-27 19:50:01,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.62 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 118.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 573.81 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 102.5 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 135.71 ms. Allocated memory is still 151.0 MB. Free memory was 102.5 MB in the beginning and 133.8 MB in the end (delta: -31.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 789.11 ms. Allocated memory is still 151.0 MB. Free memory was 133.8 MB in the beginning and 88.4 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 45925.62 ms. Allocated memory was 151.0 MB in the beginning and 653.3 MB in the end (delta: 502.3 MB). Free memory was 87.9 MB in the beginning and 260.9 MB in the end (delta: -173.0 MB). Peak memory consumption was 329.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...