/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:32:28,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:32:28,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:32:28,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:32:28,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:32:28,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:32:28,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:32:28,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:32:28,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:32:28,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:32:28,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:32:28,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:32:28,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:32:28,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:32:28,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:32:28,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:32:28,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:32:28,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:32:28,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:32:28,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:32:28,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:32:28,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:32:28,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:32:28,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:32:28,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:32:28,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:32:28,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:32:28,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:32:28,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:32:28,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:32:28,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:32:28,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:32:28,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:32:28,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:32:28,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:32:28,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:32:28,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:32:28,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:32:28,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:32:28,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:32:28,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:32:28,261 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 [2020-10-28 14:32:28,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:32:28,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:32:28,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:32:28,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:32:28,329 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:32:28,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:32:28,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:32:28,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:32:28,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:32:28,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:32:28,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:32:28,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:32:28,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:32:28,332 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:32:28,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:32:28,333 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:32:28,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:32:28,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:32:28,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:32:28,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:32:28,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:32:28,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:32:28,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:32:28,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:32:28,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:32:28,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:32:28,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:32:28,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:32:28,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:32:28,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:32:28,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:32:28,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:32:28,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:32:28,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:32:28,791 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:32:28,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-10-28 14:32:28,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d38057a4f/6449af2621aa4977bd240cf2b0f4cbc6/FLAG878bd5160 [2020-10-28 14:32:29,637 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:32:29,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-10-28 14:32:29,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d38057a4f/6449af2621aa4977bd240cf2b0f4cbc6/FLAG878bd5160 [2020-10-28 14:32:29,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d38057a4f/6449af2621aa4977bd240cf2b0f4cbc6 [2020-10-28 14:32:29,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:32:29,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:32:29,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:32:29,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:32:29,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:32:29,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:32:29" (1/1) ... [2020-10-28 14:32:29,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bed0a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:29, skipping insertion in model container [2020-10-28 14:32:29,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:32:29" (1/1) ... [2020-10-28 14:32:29,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:32:30,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:32:30,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:32:30,407 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:32:30,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:32:30,532 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:32:30,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30 WrapperNode [2020-10-28 14:32:30,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:32:30,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:32:30,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:32:30,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:32:30,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (1/1) ... [2020-10-28 14:32:30,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (1/1) ... [2020-10-28 14:32:30,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (1/1) ... [2020-10-28 14:32:30,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (1/1) ... [2020-10-28 14:32:30,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (1/1) ... [2020-10-28 14:32:30,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (1/1) ... [2020-10-28 14:32:30,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (1/1) ... [2020-10-28 14:32:30,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:32:30,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:32:30,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:32:30,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:32:30,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (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 [2020-10-28 14:32:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:32:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:32:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:32:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:32:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:32:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:32:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:32:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:32:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:32:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:32:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:32:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:32:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:32:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:32:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:32:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:32:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:32:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:32:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:32:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:32:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:32:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:32:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:32:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:32:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:32:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:32:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:32:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:32:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:32:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:32:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:32:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:32:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:32:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:32:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:32:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:32:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:32:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:32:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:32:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:32:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:32:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:32:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:32:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:32:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:32:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:32:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:32:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:32:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:32:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:32:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:32:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:32:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:32:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:32:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:32:30,727 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:32:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:32:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:32:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:32:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:32:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:32:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:32:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:32:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:32:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:32:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:32:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:32:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:32:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:32:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:32:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:32:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:32:30,732 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:32:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:32:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:32:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:32:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:32:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:32:30,733 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:32:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:32:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:32:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:32:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:32:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:32:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:32:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:32:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:32:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:32:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:32:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:32:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:32:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:32:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:32:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:32:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:32:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:32:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:32:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:32:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:32:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:32:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:32:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:32:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:32:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:32:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:32:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:32:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:32:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:32:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:32:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:32:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:32:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:32:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:32:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:32:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:32:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:32:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:32:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:32:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:32:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:32:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:32:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:32:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:32:31,512 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:32:31,512 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-28 14:32:31,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:32:31 BoogieIcfgContainer [2020-10-28 14:32:31,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:32:31,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:32:31,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:32:31,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:32:31,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:32:29" (1/3) ... [2020-10-28 14:32:31,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc4b11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:32:31, skipping insertion in model container [2020-10-28 14:32:31,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:32:30" (2/3) ... [2020-10-28 14:32:31,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc4b11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:32:31, skipping insertion in model container [2020-10-28 14:32:31,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:32:31" (3/3) ... [2020-10-28 14:32:31,532 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-10-28 14:32:31,546 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:32:31,552 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:32:31,567 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:32:31,608 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:32:31,609 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:32:31,609 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:32:31,609 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:32:31,616 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:32:31,616 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:32:31,616 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:32:31,616 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:32:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-28 14:32:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:32:31,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:31,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:31,654 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:31,662 INFO L82 PathProgramCache]: Analyzing trace with hash -630579744, now seen corresponding path program 1 times [2020-10-28 14:32:31,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:31,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35290768] [2020-10-28 14:32:31,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:31,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:31,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:32,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:32,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:32:32,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:32,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-28 14:32:32,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:32,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:32:32,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:32,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:32:32,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:32,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:32,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:32,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:32,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:32,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 14:32:32,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:32,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:32,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:32,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:32,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35290768] [2020-10-28 14:32:32,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:32,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:32:32,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371444620] [2020-10-28 14:32:32,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:32:32,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:32,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:32:32,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:32:32,410 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-10-28 14:32:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:32,633 INFO L93 Difference]: Finished difference Result 71 states and 117 transitions. [2020-10-28 14:32:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:32:32,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:32:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:32,646 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:32:32,646 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:32:32,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:32:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:32:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 14:32:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:32:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-28 14:32:32,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2020-10-28 14:32:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:32,715 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-28 14:32:32,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:32:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-28 14:32:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:32:32,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:32,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:32,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:32:32,718 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1372892906, now seen corresponding path program 1 times [2020-10-28 14:32:32,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:32,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801633698] [2020-10-28 14:32:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:32,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:32,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:32:32,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:32,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-28 14:32:32,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:32,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:32,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:32:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:32,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 14:32:32,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:32,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:32,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:33,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:33,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:33,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:33,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:32:33,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:33,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:33,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:33,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:33,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801633698] [2020-10-28 14:32:33,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:33,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:32:33,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141477853] [2020-10-28 14:32:33,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:32:33,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:32:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:32:33,036 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2020-10-28 14:32:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:33,177 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-28 14:32:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:32:33,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:32:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:33,179 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:32:33,179 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 14:32:33,180 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 [2020-10-28 14:32:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 14:32:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-28 14:32:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:32:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-28 14:32:33,188 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 13 [2020-10-28 14:32:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:33,188 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-28 14:32:33,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:32:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-28 14:32:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:32:33,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:33,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:33,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:32:33,190 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:33,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1882684930, now seen corresponding path program 1 times [2020-10-28 14:32:33,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:33,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51004362] [2020-10-28 14:32:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:33,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:33,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:33,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:32:33,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:33,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 14:32:33,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:33,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:33,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:32:33,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:33,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:32:33,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:32:33,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:33,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:33,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:33,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:33,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:33,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:32:33,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:33,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:33,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:33,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51004362] [2020-10-28 14:32:33,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:33,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:32:33,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448757202] [2020-10-28 14:32:33,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:32:33,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:32:33,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:32:33,456 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-28 14:32:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:33,630 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-28 14:32:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:32:33,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:32:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:33,632 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:32:33,632 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:32:33,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:32:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-10-28 14:32:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:32:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 14:32:33,642 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2020-10-28 14:32:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:33,642 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 14:32:33,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:32:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 14:32:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:32:33,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:33,644 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:33,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:32:33,644 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash -922245935, now seen corresponding path program 1 times [2020-10-28 14:32:33,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:33,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373138257] [2020-10-28 14:32:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:33,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:34,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:32:34,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:34,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-28 14:32:34,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:34,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:34,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:32:34,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:34,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:32:34,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:34,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:34,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:34,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:34,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:34,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:34,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:32:34,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:34,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:34,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373138257] [2020-10-28 14:32:34,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:34,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:32:34,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132151412] [2020-10-28 14:32:34,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:32:34,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:34,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:32:34,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:34,351 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 8 states. [2020-10-28 14:32:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:34,766 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-28 14:32:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:32:34,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 14:32:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:34,768 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:32:34,768 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:32:34,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:32:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2020-10-28 14:32:34,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:32:34,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-28 14:32:34,777 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 19 [2020-10-28 14:32:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:34,777 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-28 14:32:34,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:32:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-28 14:32:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 14:32:34,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:34,779 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:34,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:32:34,779 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:34,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:34,780 INFO L82 PathProgramCache]: Analyzing trace with hash -221181357, now seen corresponding path program 1 times [2020-10-28 14:32:34,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:34,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247533313] [2020-10-28 14:32:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:34,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:32:35,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-28 14:32:35,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:32:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:32:35,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:35,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:35,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:35,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:32:35,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:35,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:35,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:35,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247533313] [2020-10-28 14:32:35,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:35,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:32:35,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681039567] [2020-10-28 14:32:35,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:32:35,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:35,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:32:35,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:35,322 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 8 states. [2020-10-28 14:32:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:35,597 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-28 14:32:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:32:35,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 14:32:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:35,603 INFO L225 Difference]: With dead ends: 54 [2020-10-28 14:32:35,603 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:32:35,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:32:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:32:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2020-10-28 14:32:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:32:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 14:32:35,611 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-28 14:32:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:35,611 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 14:32:35,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:32:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 14:32:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:32:35,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:35,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:35,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:32:35,612 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1654214030, now seen corresponding path program 1 times [2020-10-28 14:32:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:35,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274028499] [2020-10-28 14:32:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:35,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:35,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:35,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:32:35,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:35,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-28 14:32:35,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:35,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:35,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:32:35,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:35,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:32:35,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:35,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:36,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:36,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:36,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:36,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:36,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:36,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:36,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:36,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274028499] [2020-10-28 14:32:36,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:32:36,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:32:36,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488790058] [2020-10-28 14:32:36,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:32:36,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:32:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:32:36,014 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-28 14:32:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:36,192 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-28 14:32:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:32:36,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 14:32:36,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:36,195 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:32:36,195 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 14:32:36,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 14:32:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-28 14:32:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:32:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 14:32:36,204 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 20 [2020-10-28 14:32:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:36,204 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 14:32:36,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:32:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 14:32:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:32:36,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:36,205 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] [2020-10-28 14:32:36,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:32:36,206 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:36,206 INFO L82 PathProgramCache]: Analyzing trace with hash 128959175, now seen corresponding path program 1 times [2020-10-28 14:32:36,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:36,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915014978] [2020-10-28 14:32:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:36,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:36,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:32:36,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:36,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-28 14:32:36,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:36,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:32:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:32:36,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:36,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:36,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:36,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:36,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:36,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:36,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:36,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:36,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:36,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:36,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:36,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:36,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915014978] [2020-10-28 14:32:36,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:36,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:32:36,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045228487] [2020-10-28 14:32:36,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:32:36,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:32:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:32:36,505 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 7 states. [2020-10-28 14:32:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:36,737 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-10-28 14:32:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:32:36,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-28 14:32:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:36,739 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:32:36,739 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:32:36,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:32:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-28 14:32:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:32:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-28 14:32:36,750 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 23 [2020-10-28 14:32:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:36,751 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-28 14:32:36,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:32:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-28 14:32:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:32:36,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:36,752 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] [2020-10-28 14:32:36,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:32:36,753 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:36,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:36,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1442690721, now seen corresponding path program 1 times [2020-10-28 14:32:36,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:36,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555696032] [2020-10-28 14:32:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:36,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:36,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:37,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-28 14:32:37,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:37,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:32:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:37,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:32:37,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:37,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:37,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:37,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:37,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:37,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:37,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:37,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:37,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555696032] [2020-10-28 14:32:37,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:37,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:32:37,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888950745] [2020-10-28 14:32:37,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:32:37,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:37,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:32:37,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:37,591 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 8 states. [2020-10-28 14:32:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:37,891 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-28 14:32:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:32:37,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 14:32:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:37,894 INFO L225 Difference]: With dead ends: 79 [2020-10-28 14:32:37,894 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 14:32:37,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:32:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 14:32:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 53. [2020-10-28 14:32:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 14:32:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-28 14:32:37,910 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 23 [2020-10-28 14:32:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:37,914 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-28 14:32:37,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:32:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-28 14:32:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:32:37,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:37,916 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:37,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:32:37,916 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2015565550, now seen corresponding path program 2 times [2020-10-28 14:32:37,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:37,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819710900] [2020-10-28 14:32:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:37,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:32:38,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:38,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-28 14:32:38,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:32:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:32:38,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:38,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:38,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:38,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:38,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:38,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:38,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:32:38,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819710900] [2020-10-28 14:32:38,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:38,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:32:38,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692938136] [2020-10-28 14:32:38,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:32:38,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:38,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:32:38,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:32:38,130 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 6 states. [2020-10-28 14:32:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:38,292 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-10-28 14:32:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:32:38,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-28 14:32:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:38,294 INFO L225 Difference]: With dead ends: 69 [2020-10-28 14:32:38,294 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:32:38,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:32:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 14:32:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:32:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-28 14:32:38,310 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 26 [2020-10-28 14:32:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:38,310 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-28 14:32:38,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:32:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-28 14:32:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:32:38,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:38,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:38,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:32:38,312 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:38,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1868815080, now seen corresponding path program 1 times [2020-10-28 14:32:38,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:38,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626660732] [2020-10-28 14:32:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:38,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:32:38,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:38,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-28 14:32:38,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:32:38,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:38,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:32:38,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:38,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:38,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:38,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:38,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:38,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:38,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:38,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:38,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:38,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:38,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626660732] [2020-10-28 14:32:38,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:38,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:32:38,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48961017] [2020-10-28 14:32:38,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:32:38,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:38,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:32:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:32:38,687 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-10-28 14:32:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:39,062 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-28 14:32:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:32:39,063 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 14:32:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:39,063 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:32:39,063 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 14:32:39,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:32:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 14:32:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-28 14:32:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:32:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-28 14:32:39,079 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 26 [2020-10-28 14:32:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:39,082 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-28 14:32:39,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:32:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-28 14:32:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:32:39,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:39,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:39,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:32:39,083 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash 432007510, now seen corresponding path program 1 times [2020-10-28 14:32:39,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:39,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296947144] [2020-10-28 14:32:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:39,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:39,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:32:39,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:39,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-28 14:32:39,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:39,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:39,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:32:39,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:39,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:32:39,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:39,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:39,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:39,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:39,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:39,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:39,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:39,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:39,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:39,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:39,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:39,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296947144] [2020-10-28 14:32:39,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:39,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:32:39,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327623917] [2020-10-28 14:32:39,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:32:39,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:39,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:32:39,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:32:39,507 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 9 states. [2020-10-28 14:32:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:40,032 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-10-28 14:32:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:32:40,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 14:32:40,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:40,036 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:32:40,036 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:32:40,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:32:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2020-10-28 14:32:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:32:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-28 14:32:40,057 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 26 [2020-10-28 14:32:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:40,057 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-28 14:32:40,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:32:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-28 14:32:40,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:32:40,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:40,062 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:40,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:32:40,062 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:40,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1718954766, now seen corresponding path program 1 times [2020-10-28 14:32:40,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:40,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675158789] [2020-10-28 14:32:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:40,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:40,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:40,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:40,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:32:40,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:32:40,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-28 14:32:40,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:40,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:32:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:32:40,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:41,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:41,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:41,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:41,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:41,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:41,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:41,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:41,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:41,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:32:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:41,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675158789] [2020-10-28 14:32:41,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:41,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:32:41,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440973216] [2020-10-28 14:32:41,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:32:41,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:32:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:32:41,038 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 8 states. [2020-10-28 14:32:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:41,317 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-28 14:32:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:32:41,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-28 14:32:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:41,319 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:32:41,319 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:32:41,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:32:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:32:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-28 14:32:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:32:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-28 14:32:41,338 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 26 [2020-10-28 14:32:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:41,338 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-28 14:32:41,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:32:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-28 14:32:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:41,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:41,342 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:41,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:32:41,342 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:41,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1684555517, now seen corresponding path program 2 times [2020-10-28 14:32:41,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:41,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154414633] [2020-10-28 14:32:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:41,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:41,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:41,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-28 14:32:41,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:41,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:32:41,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:41,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:32:41,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:41,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:41,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:41,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:41,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:41,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:41,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:41,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:41,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:41,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:41,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154414633] [2020-10-28 14:32:41,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:41,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446287796] [2020-10-28 14:32:41,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:41,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:41,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:41,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:41,904 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 10 states. [2020-10-28 14:32:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:42,289 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2020-10-28 14:32:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:32:42,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:42,296 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:32:42,296 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:32:42,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:32:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-10-28 14:32:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:32:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-28 14:32:42,319 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 29 [2020-10-28 14:32:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:42,320 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-28 14:32:42,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-28 14:32:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:42,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:42,321 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:42,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:32:42,321 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:42,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2095142183, now seen corresponding path program 3 times [2020-10-28 14:32:42,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:42,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193674828] [2020-10-28 14:32:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:42,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:42,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:43,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:43,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:43,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:43,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 663 [2020-10-28 14:32:43,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:43,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:32:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:43,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:32:43,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:43,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:43,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:43,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:43,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:43,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:43,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:32:43,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:43,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:43,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:43,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:43,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:43,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:43,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193674828] [2020-10-28 14:32:43,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:43,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:43,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167520048] [2020-10-28 14:32:43,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:43,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:43,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:43,313 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 10 states. [2020-10-28 14:32:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:43,821 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-10-28 14:32:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:32:43,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:43,824 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:32:43,825 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:32:43,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:32:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:32:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2020-10-28 14:32:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:32:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-28 14:32:43,843 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 29 [2020-10-28 14:32:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:43,844 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-28 14:32:43,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-28 14:32:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:43,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:43,845 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:43,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:32:43,845 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash 100997477, now seen corresponding path program 1 times [2020-10-28 14:32:43,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:43,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983475751] [2020-10-28 14:32:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:43,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:44,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:44,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:44,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:44,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:44,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-28 14:32:44,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:44,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:44,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:32:44,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:44,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:32:44,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:44,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:44,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:44,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:44,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:44,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:44,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:32:44,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:44,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:44,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:44,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:44,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:44,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:44,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983475751] [2020-10-28 14:32:44,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:44,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:44,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065810416] [2020-10-28 14:32:44,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:44,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:44,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:44,918 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 10 states. [2020-10-28 14:32:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:45,374 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2020-10-28 14:32:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:32:45,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:45,376 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:32:45,376 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:32:45,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:32:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:32:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2020-10-28 14:32:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:32:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-28 14:32:45,390 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 29 [2020-10-28 14:32:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:45,390 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-28 14:32:45,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-28 14:32:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:45,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:45,391 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:45,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:32:45,391 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:45,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2107257343, now seen corresponding path program 2 times [2020-10-28 14:32:45,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:45,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234574548] [2020-10-28 14:32:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:45,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:32:46,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:32:46,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-28 14:32:46,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:32:46,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:32:46,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:32:46,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:46,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:32:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:32:46,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:32:46,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:32:46,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:32:46,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:32:46,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:32:46,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:32:46,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:32:46,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:32:46,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:32:46,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:32:46,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:32:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:32:46,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234574548] [2020-10-28 14:32:46,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:32:46,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:32:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669758957] [2020-10-28 14:32:46,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:32:46,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:32:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:32:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:32:46,334 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 10 states. [2020-10-28 14:32:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:32:46,905 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-28 14:32:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:32:46,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-28 14:32:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:32:46,906 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:32:46,906 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:32:46,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:32:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:32:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 73. [2020-10-28 14:32:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:32:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-28 14:32:46,924 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 29 [2020-10-28 14:32:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:32:46,925 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-28 14:32:46,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:32:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-28 14:32:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:32:46,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:32:46,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:32:46,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:32:46,927 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:32:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:32:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash -43704933, now seen corresponding path program 1 times [2020-10-28 14:32:46,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:32:46,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607884078] [2020-10-28 14:32:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:32:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:32:46,952 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:32:46,952 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:32:46,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:32:46,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:32:46 BoogieIcfgContainer [2020-10-28 14:32:46,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:32:46,978 INFO L168 Benchmark]: Toolchain (without parser) took 17010.20 ms. Allocated memory was 162.5 MB in the beginning and 395.3 MB in the end (delta: 232.8 MB). Free memory was 135.9 MB in the beginning and 238.3 MB in the end (delta: -102.3 MB). Peak memory consumption was 132.3 MB. Max. memory is 8.0 GB. [2020-10-28 14:32:46,978 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:32:46,979 INFO L168 Benchmark]: CACSL2BoogieTranslator took 559.88 ms. Allocated memory is still 162.5 MB. Free memory was 135.3 MB in the beginning and 113.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:32:46,979 INFO L168 Benchmark]: Boogie Preprocessor took 80.89 ms. Allocated memory is still 162.5 MB. Free memory was 113.2 MB in the beginning and 110.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:32:46,980 INFO L168 Benchmark]: RCFGBuilder took 899.12 ms. Allocated memory is still 162.5 MB. Free memory was 110.3 MB in the beginning and 101.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:32:46,981 INFO L168 Benchmark]: TraceAbstraction took 15456.98 ms. Allocated memory was 162.5 MB in the beginning and 395.3 MB in the end (delta: 232.8 MB). Free memory was 100.6 MB in the beginning and 238.3 MB in the end (delta: -137.7 MB). Peak memory consumption was 96.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:32:46,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 559.88 ms. Allocated memory is still 162.5 MB. Free memory was 135.3 MB in the beginning and 113.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 80.89 ms. Allocated memory is still 162.5 MB. Free memory was 113.2 MB in the beginning and 110.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 899.12 ms. Allocated memory is still 162.5 MB. Free memory was 110.3 MB in the beginning and 101.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15456.98 ms. Allocated memory was 162.5 MB in the beginning and 395.3 MB in the end (delta: 232.8 MB). Free memory was 100.6 MB in the beginning and 238.3 MB in the end (delta: -137.7 MB). Peak memory consumption was 96.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 993]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1005] SLL* null = malloc(sizeof(SLL)); [L1006] null->colour = BLACK [L1007] null->next = ((void*)0) [L1009] SLL* list = malloc(sizeof(SLL)); [L1010] list->next = null [L1011] list->colour = BLACK [L1013] SLL* end = list; [L1016] COND TRUE __VERIFIER_nondet_int() [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1023] COND FALSE !(__VERIFIER_nondet_int()) [L1029] end->colour = RED [L1030] end->next = malloc(sizeof(SLL)) [L1031] EXPR end->next [L1031] end = end->next [L1032] end->next = null [L1033] end->colour = BLACK [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list [L1041] COND FALSE !(!(null != end)) [L1042] EXPR end->colour [L1042] COND FALSE !(!(BLACK == end->colour)) [L1044] COND TRUE null != end [L1046] EXPR end->colour [L1046] COND FALSE !(RED == end->colour) [L1053] EXPR end->next [L1053] end = end->next [L1044] COND TRUE null != end [L1046] EXPR end->colour [L1046] COND TRUE RED == end->colour [L1048] EXPR end->next [L1048] end = end->next [L1049] COND FALSE !(!(null != end)) [L1050] EXPR end->colour [L1050] COND TRUE !(BLACK != end->colour) [L1050] CALL reach_error() [L993] COND FALSE !(0) [L993] __assert_fail ("0", "sll-rb-sentinel-2.c", 13, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.3s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 433 SDtfs, 651 SDslu, 1429 SDs, 0 SdLazy, 2428 SolverSat, 281 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 296 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 394 NumberOfCodeBlocks, 394 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 349 ConstructedInterpolants, 0 QuantifiedInterpolants, 105712 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 6/61 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...