/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-buckets-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:46:22,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:46:22,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:46:22,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:46:22,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:46:22,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:46:22,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:46:22,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:46:22,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:46:22,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:46:22,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:46:22,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:46:22,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:46:22,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:46:22,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:46:22,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:46:22,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:46:22,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:46:22,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:46:22,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:46:22,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:46:22,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:46:22,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:46:22,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:46:22,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:46:22,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:46:22,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:46:22,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:46:22,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:46:22,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:46:22,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:46:22,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:46:22,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:46:22,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:46:22,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:46:22,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:46:22,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:46:22,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:46:22,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:46:22,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:46:22,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:46:22,339 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 19:46:22,372 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:46:22,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:46:22,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:46:22,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:46:22,375 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:46:22,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:46:22,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:46:22,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:46:22,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:46:22,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:46:22,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:46:22,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:46:22,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:46:22,380 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:46:22,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:46:22,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:46:22,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:46:22,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:46:22,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:46:22,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:46:22,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:46:22,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:22,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:46:22,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:46:22,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:46:22,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:46:22,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:46:22,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:46:22,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:46:22,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:46:22,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:46:22,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:46:22,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:46:22,855 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:46:22,856 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:46:22,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-buckets-2.i [2020-10-27 19:46:22,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0a8122d2/86b7f1db3fed4d699c0bf98274ffc183/FLAGea4de0caf [2020-10-27 19:46:23,821 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:46:23,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-buckets-2.i [2020-10-27 19:46:23,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0a8122d2/86b7f1db3fed4d699c0bf98274ffc183/FLAGea4de0caf [2020-10-27 19:46:24,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0a8122d2/86b7f1db3fed4d699c0bf98274ffc183 [2020-10-27 19:46:24,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:46:24,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:46:24,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:24,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:46:24,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:46:24,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6552cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24, skipping insertion in model container [2020-10-27 19:46:24,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:46:24,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:46:24,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:24,567 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:46:24,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:24,688 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:46:24,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24 WrapperNode [2020-10-27 19:46:24,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:24,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:46:24,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:46:24,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:46:24,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (1/1) ... [2020-10-27 19:46:24,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:24,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:24,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:24,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:24,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (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 19:46:24,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:24,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:24,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:24,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:24,873 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:24,874 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:24,878 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:24,879 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:24,880 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:24,880 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:24,880 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:24,880 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:24,880 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:24,880 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:24,880 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:24,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:25,644 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:25,644 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-10-27 19:46:25,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:25 BoogieIcfgContainer [2020-10-27 19:46:25,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:25,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:25,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:25,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:25,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:46:24" (1/3) ... [2020-10-27 19:46:25,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db0b5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:25, skipping insertion in model container [2020-10-27 19:46:25,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:24" (2/3) ... [2020-10-27 19:46:25,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db0b5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:25, skipping insertion in model container [2020-10-27 19:46:25,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:25" (3/3) ... [2020-10-27 19:46:25,656 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2020-10-27 19:46:25,669 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:25,676 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:25,690 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:25,721 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:25,721 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:25,722 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:25,722 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:25,722 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:25,722 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:25,722 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:25,722 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-27 19:46:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 19:46:25,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:25,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:25,751 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:25,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2031057720, now seen corresponding path program 1 times [2020-10-27 19:46:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:25,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903301454] [2020-10-27 19:46:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 19:46:26,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:26,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-27 19:46:26,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:26,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:26,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:26,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:46:26,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:26,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:26,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:46:26,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:26,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:26,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,661 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 19:46:26,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903301454] [2020-10-27 19:46:26,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:26,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:26,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176856462] [2020-10-27 19:46:26,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:26,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:26,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:26,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:26,692 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 5 states. [2020-10-27 19:46:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:27,001 INFO L93 Difference]: Finished difference Result 120 states and 208 transitions. [2020-10-27 19:46:27,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:27,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 19:46:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:27,014 INFO L225 Difference]: With dead ends: 120 [2020-10-27 19:46:27,014 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 19:46:27,018 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 19:46:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 19:46:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2020-10-27 19:46:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 19:46:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-27 19:46:27,070 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 14 [2020-10-27 19:46:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:27,070 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-27 19:46:27,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-27 19:46:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 19:46:27,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:27,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:27,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:27,073 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1948730651, now seen corresponding path program 1 times [2020-10-27 19:46:27,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:27,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534701202] [2020-10-27 19:46:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:46:27,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:27,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-27 19:46:27,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:27,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:46:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:27,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:27,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:27,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:27,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:27,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:27,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:27,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:27,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,644 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 19:46:27,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534701202] [2020-10-27 19:46:27,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:27,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146025371] [2020-10-27 19:46:27,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:27,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:27,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:27,649 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 4 states. [2020-10-27 19:46:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:27,879 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-27 19:46:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:27,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 19:46:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:27,881 INFO L225 Difference]: With dead ends: 51 [2020-10-27 19:46:27,881 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:46:27,882 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 19:46:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:46:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-27 19:46:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 19:46:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-27 19:46:27,891 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 15 [2020-10-27 19:46:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:27,891 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-27 19:46:27,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-27 19:46:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:27,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:27,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:27,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:27,893 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash 314866980, now seen corresponding path program 1 times [2020-10-27 19:46:27,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:27,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73296566] [2020-10-27 19:46:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:28,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 19:46:28,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:28,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:28,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:28,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:28,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:28,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,181 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 19:46:28,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73296566] [2020-10-27 19:46:28,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:28,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:28,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495987079] [2020-10-27 19:46:28,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:28,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:28,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:28,187 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 6 states. [2020-10-27 19:46:28,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:28,588 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-27 19:46:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:28,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 19:46:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:28,591 INFO L225 Difference]: With dead ends: 67 [2020-10-27 19:46:28,591 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 19:46:28,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 19:46:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-27 19:46:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 19:46:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-27 19:46:28,615 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 16 [2020-10-27 19:46:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:28,615 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-27 19:46:28,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:28,616 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-27 19:46:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:28,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:28,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:28,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:28,617 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1947134467, now seen corresponding path program 1 times [2020-10-27 19:46:28,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:28,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769429065] [2020-10-27 19:46:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:28,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-27 19:46:28,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:28,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:46:28,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:28,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:28,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:28,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:28,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:28,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:28,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,847 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 19:46:28,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769429065] [2020-10-27 19:46:28,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:28,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:28,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221554575] [2020-10-27 19:46:28,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:28,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:28,849 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2020-10-27 19:46:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:29,105 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-27 19:46:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:29,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 19:46:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:29,107 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:46:29,107 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 19:46:29,108 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 19:46:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 19:46:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 19:46:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:46:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-27 19:46:29,123 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 16 [2020-10-27 19:46:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:29,123 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-27 19:46:29,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-27 19:46:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:46:29,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:29,126 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:29,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:29,126 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:29,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:29,127 INFO L82 PathProgramCache]: Analyzing trace with hash 59150788, now seen corresponding path program 1 times [2020-10-27 19:46:29,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:29,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506214646] [2020-10-27 19:46:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:29,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:29,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:46:29,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:29,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 19:46:29,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:29,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:29,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:29,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:29,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:29,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:29,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:29,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:29,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:46:29,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:29,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:29,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:29,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:29,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:29,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506214646] [2020-10-27 19:46:29,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:29,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:29,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016681684] [2020-10-27 19:46:29,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:29,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:29,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:29,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:29,882 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 8 states. [2020-10-27 19:46:30,361 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-27 19:46:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:30,649 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-10-27 19:46:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:30,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 19:46:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:30,651 INFO L225 Difference]: With dead ends: 68 [2020-10-27 19:46:30,651 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:46:30,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:46:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 19:46:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:46:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-27 19:46:30,667 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 21 [2020-10-27 19:46:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:30,670 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-27 19:46:30,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-27 19:46:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:30,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:30,671 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:30,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:30,672 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:30,673 INFO L82 PathProgramCache]: Analyzing trace with hash -465827442, now seen corresponding path program 1 times [2020-10-27 19:46:30,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:30,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127493509] [2020-10-27 19:46:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:30,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:31,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:31,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:31,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-27 19:46:31,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:46:31,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:31,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:31,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:31,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:31,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:46:31,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:31,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:31,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:31,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:31,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127493509] [2020-10-27 19:46:31,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:31,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:31,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349297872] [2020-10-27 19:46:31,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:31,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:31,458 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 8 states. [2020-10-27 19:46:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:31,975 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2020-10-27 19:46:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:31,976 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:46:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:31,978 INFO L225 Difference]: With dead ends: 103 [2020-10-27 19:46:31,978 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 19:46:31,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 19:46:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2020-10-27 19:46:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 19:46:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-27 19:46:31,996 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 22 [2020-10-27 19:46:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:31,997 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-27 19:46:31,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-27 19:46:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 19:46:32,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:32,000 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:32,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:32,001 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:32,001 INFO L82 PathProgramCache]: Analyzing trace with hash 311951251, now seen corresponding path program 2 times [2020-10-27 19:46:32,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:32,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559605136] [2020-10-27 19:46:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 19:46:32,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:32,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 873 [2020-10-27 19:46:32,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:32,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:32,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:33,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:33,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:33,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:33,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:33,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:33,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:33,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:33,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:33,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:33,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:33,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559605136] [2020-10-27 19:46:33,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:33,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686886686] [2020-10-27 19:46:33,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:33,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:33,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:33,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:33,079 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 8 states. [2020-10-27 19:46:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:33,684 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2020-10-27 19:46:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:33,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 19:46:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:33,687 INFO L225 Difference]: With dead ends: 124 [2020-10-27 19:46:33,687 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 19:46:33,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 19:46:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2020-10-27 19:46:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 19:46:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2020-10-27 19:46:33,709 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 24 [2020-10-27 19:46:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:33,709 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2020-10-27 19:46:33,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2020-10-27 19:46:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:33,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:33,710 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:33,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:33,711 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:33,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1979879590, now seen corresponding path program 1 times [2020-10-27 19:46:33,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:33,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670190222] [2020-10-27 19:46:33,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:33,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:34,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:34,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:34,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-27 19:46:34,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:34,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:34,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:34,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:34,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:34,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:34,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:34,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:34,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:34,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:34,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:34,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:34,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:34,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:34,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:34,881 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 19:46:34,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670190222] [2020-10-27 19:46:34,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:34,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:34,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18444643] [2020-10-27 19:46:34,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:34,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:34,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:34,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:34,886 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 10 states. [2020-10-27 19:46:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:36,124 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2020-10-27 19:46:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:36,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 19:46:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:36,126 INFO L225 Difference]: With dead ends: 152 [2020-10-27 19:46:36,126 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 19:46:36,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 19:46:36,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2020-10-27 19:46:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:46:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-10-27 19:46:36,138 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 25 [2020-10-27 19:46:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:36,138 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-10-27 19:46:36,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-10-27 19:46:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:36,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:36,139 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:36,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:36,140 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:36,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1294019352, now seen corresponding path program 1 times [2020-10-27 19:46:36,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:36,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695881523] [2020-10-27 19:46:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:36,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 19:46:36,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:36,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:36,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:36,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:36,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:36,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:36,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:36,603 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 19:46:36,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695881523] [2020-10-27 19:46:36,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:36,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:36,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189314925] [2020-10-27 19:46:36,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:36,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:36,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:36,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:36,607 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 9 states. [2020-10-27 19:46:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:37,305 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2020-10-27 19:46:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:37,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 19:46:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:37,307 INFO L225 Difference]: With dead ends: 127 [2020-10-27 19:46:37,307 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 19:46:37,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:37,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 19:46:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 81. [2020-10-27 19:46:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:46:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-10-27 19:46:37,317 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 25 [2020-10-27 19:46:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:37,317 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-10-27 19:46:37,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-10-27 19:46:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:37,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:37,319 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:37,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:37,319 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1844994340, now seen corresponding path program 2 times [2020-10-27 19:46:37,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:37,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48687377] [2020-10-27 19:46:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:37,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:37,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:37,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-27 19:46:37,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:37,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:38,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:38,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:38,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:38,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:38,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:38,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:38,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48687377] [2020-10-27 19:46:38,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:38,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076404439] [2020-10-27 19:46:38,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:38,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:38,053 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 10 states. [2020-10-27 19:46:38,518 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-27 19:46:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:39,075 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2020-10-27 19:46:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:39,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 19:46:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:39,077 INFO L225 Difference]: With dead ends: 103 [2020-10-27 19:46:39,077 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:46:39,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:46:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-27 19:46:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 19:46:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-10-27 19:46:39,092 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 26 [2020-10-27 19:46:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:39,094 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-10-27 19:46:39,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-10-27 19:46:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:39,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:39,100 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:39,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:39,100 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:39,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1301750367, now seen corresponding path program 2 times [2020-10-27 19:46:39,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:39,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446545190] [2020-10-27 19:46:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:39,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:39,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:39,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:39,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 19:46:39,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:46:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:39,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:39,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:39,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:39,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:39,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:39,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:39,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:39,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:39,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:39,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446545190] [2020-10-27 19:46:39,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:39,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:39,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019367045] [2020-10-27 19:46:39,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:39,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:39,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:39,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:39,559 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 9 states. [2020-10-27 19:46:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:40,493 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2020-10-27 19:46:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:40,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 19:46:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:40,495 INFO L225 Difference]: With dead ends: 149 [2020-10-27 19:46:40,495 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 19:46:40,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 19:46:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2020-10-27 19:46:40,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:46:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-27 19:46:40,505 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 27 [2020-10-27 19:46:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:40,506 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-27 19:46:40,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-27 19:46:40,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:40,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:40,507 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:40,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:40,508 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:40,508 INFO L82 PathProgramCache]: Analyzing trace with hash -692394339, now seen corresponding path program 2 times [2020-10-27 19:46:40,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:40,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107118186] [2020-10-27 19:46:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:40,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:40,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:40,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-27 19:46:40,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:40,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:40,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:40,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:40,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:41,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:41,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:41,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:41,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:41,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:41,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:41,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:41,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107118186] [2020-10-27 19:46:41,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:41,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:41,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898198579] [2020-10-27 19:46:41,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:41,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:41,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:41,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:41,013 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-10-27 19:46:42,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:42,312 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2020-10-27 19:46:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:42,313 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 19:46:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:42,314 INFO L225 Difference]: With dead ends: 148 [2020-10-27 19:46:42,314 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 19:46:42,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 19:46:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-27 19:46:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 19:46:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-10-27 19:46:42,324 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 27 [2020-10-27 19:46:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:42,324 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-10-27 19:46:42,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-10-27 19:46:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:42,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:42,325 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:42,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:42,325 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:42,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:42,326 INFO L82 PathProgramCache]: Analyzing trace with hash 95128516, now seen corresponding path program 1 times [2020-10-27 19:46:42,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:42,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254707718] [2020-10-27 19:46:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 19:46:42,357 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 19:46:42,357 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 19:46:42,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:42,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 07:46:42 BoogieIcfgContainer [2020-10-27 19:46:42,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 19:46:42,383 INFO L168 Benchmark]: Toolchain (without parser) took 18320.84 ms. Allocated memory was 151.0 MB in the beginning and 325.1 MB in the end (delta: 174.1 MB). Free memory was 125.6 MB in the beginning and 204.4 MB in the end (delta: -78.8 MB). Peak memory consumption was 95.5 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:42,383 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:46:42,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 620.59 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 102.8 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:42,385 INFO L168 Benchmark]: Boogie Preprocessor took 76.04 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 99.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:42,385 INFO L168 Benchmark]: RCFGBuilder took 879.28 ms. Allocated memory is still 151.0 MB. Free memory was 99.7 MB in the beginning and 84.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:42,386 INFO L168 Benchmark]: TraceAbstraction took 16732.49 ms. Allocated memory was 151.0 MB in the beginning and 325.1 MB in the end (delta: 174.1 MB). Free memory was 84.3 MB in the beginning and 204.4 MB in the end (delta: -120.1 MB). Peak memory consumption was 54.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:46:42,389 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 620.59 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 102.8 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.04 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 99.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 879.28 ms. Allocated memory is still 151.0 MB. Free memory was 99.7 MB in the beginning and 84.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16732.49 ms. Allocated memory was 151.0 MB in the beginning and 325.1 MB in the end (delta: 174.1 MB). Free memory was 84.3 MB in the beginning and 204.4 MB in the end (delta: -120.1 MB). Peak memory consumption was 54.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1004] BCK* bucket = malloc(sizeof(BCK)); [L1005] bucket->data = 0 [L1006] bucket->list = ((void*)0) [L1008] bucket->next = malloc(sizeof(BCK)) [L1009] EXPR bucket->next [L1009] BCK* bcki = bucket->next; [L1010] bcki->data = 1 [L1011] bcki->list = ((void*)0) [L1013] bcki->next = malloc(sizeof(BCK)) [L1014] EXPR bcki->next [L1014] bcki = bcki->next [L1015] bcki->data = 2 [L1016] bcki->list = ((void*)0) [L1017] bcki->next = ((void*)0) [L1019] struct TSLL* item = ((void*)0); [L1020] struct TSLL* itr = ((void*)0); [L1021] COND TRUE __VERIFIER_nondet_int() [L1023] item = malloc(sizeof(SLL)) [L1024] item->next = ((void*)0) [L1025] COND TRUE __VERIFIER_nondet_int() [L1026] item->data = 0 [L1032] bcki = bucket [L1034] COND FALSE !(!(bcki != ((void*)0))) [L1035] COND FALSE !(!(item != ((void*)0))) [L1036] EXPR bcki->data [L1036] EXPR item->data [L1036] COND FALSE !(bcki->data != item->data) [L1038] COND FALSE !(!(bcki != ((void*)0))) [L1040] EXPR bcki->list [L1040] COND TRUE bcki->list == ((void*)0) [L1041] bcki->list = item [L1021] COND FALSE !(__VERIFIER_nondet_int()) [L1052] bcki = bucket [L1053] COND TRUE bcki != ((void*)0) [L1055] EXPR bcki->list [L1055] item = bcki->list [L1056] bcki->list = ((void*)0) [L1057] COND TRUE item != ((void*)0) [L1059] itr = item [L1060] EXPR item->next [L1060] item = item->next [L1061] EXPR itr->data [L1061] EXPR bcki->data [L1061] COND TRUE !(itr->data != bcki->data) [L1061] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "sll-buckets-2.c", 14, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.6s, OverallIterations: 13, TraceHistogramMax: 4, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 448 SDtfs, 837 SDslu, 1321 SDs, 0 SdLazy, 2445 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 239 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 288 NumberOfCodeBlocks, 288 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 246 ConstructedInterpolants, 0 QuantifiedInterpolants, 97391 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 22/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...