/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:46:00,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:46:00,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:46:00,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:46:00,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:46:00,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:46:00,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:46:00,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:46:00,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:46:00,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:46:00,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:46:00,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:46:00,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:46:00,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:46:00,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:46:00,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:46:00,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:46:00,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:46:00,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:46:00,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:46:00,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:46:00,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:46:00,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:46:00,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:46:00,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:46:00,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:46:00,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:46:00,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:46:00,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:46:00,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:46:00,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:46:00,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:46:00,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:46:00,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:46:00,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:46:00,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:46:00,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:46:00,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:46:00,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:46:00,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:46:00,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:46:00,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:46:00,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:46:00,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:46:00,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:46:00,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:46:00,762 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:46:00,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:46:00,763 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:46:00,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:46:00,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:46:00,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:46:00,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:46:00,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:46:00,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:46:00,765 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:46:00,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:46:00,765 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:46:00,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:46:00,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:46:00,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:46:00,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:46:00,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:46:00,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:00,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:46:00,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:46:00,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:46:00,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:46:00,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:46:00,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:46:00,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:46:00,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:46:01,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:46:01,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:46:01,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:46:01,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:46:01,234 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:46:01,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-reverse.i [2020-10-27 19:46:01,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22bf5ac2/5f3b03b8b49340e0bf7e15551891f9f8/FLAGbea2788fd [2020-10-27 19:46:02,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:46:02,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-reverse.i [2020-10-27 19:46:02,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22bf5ac2/5f3b03b8b49340e0bf7e15551891f9f8/FLAGbea2788fd [2020-10-27 19:46:02,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b22bf5ac2/5f3b03b8b49340e0bf7e15551891f9f8 [2020-10-27 19:46:02,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:46:02,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:46:02,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:02,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:46:02,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:46:02,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b522ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02, skipping insertion in model container [2020-10-27 19:46:02,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:46:02,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:46:02,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:02,768 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:46:02,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:02,893 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:46:02,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02 WrapperNode [2020-10-27 19:46:02,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:02,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:46:02,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:46:02,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:46:02,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (1/1) ... [2020-10-27 19:46:02,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:02,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:02,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:02,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:02,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:03,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:03,076 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:03,076 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:03,076 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:03,076 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:03,076 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:03,077 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:03,077 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:03,077 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:03,077 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:03,077 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:03,077 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:03,078 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:03,078 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:03,078 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:03,078 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:03,078 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:03,078 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:03,956 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:03,956 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-27 19:46:03,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:03 BoogieIcfgContainer [2020-10-27 19:46:03,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:03,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:03,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:03,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:03,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:46:02" (1/3) ... [2020-10-27 19:46:03,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d48b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:03, skipping insertion in model container [2020-10-27 19:46:03,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:02" (2/3) ... [2020-10-27 19:46:03,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d48b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:03, skipping insertion in model container [2020-10-27 19:46:03,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:03" (3/3) ... [2020-10-27 19:46:03,977 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2020-10-27 19:46:03,991 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:03,998 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:04,013 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:04,052 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:04,053 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:04,053 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:04,054 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:04,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:04,061 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:04,061 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:04,061 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-27 19:46:04,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:46:04,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:04,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:04,095 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash 345412413, now seen corresponding path program 1 times [2020-10-27 19:46:04,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:04,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516322332] [2020-10-27 19:46:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:46:04,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:04,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 19:46:04,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:46:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:46:04,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:04,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:04,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:04,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:04,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:04,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 19:46:04,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:04,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:04,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:04,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516322332] [2020-10-27 19:46:04,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:04,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:46:04,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011393011] [2020-10-27 19:46:04,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:46:04,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:04,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:46:04,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:04,818 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-27 19:46:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:04,993 INFO L93 Difference]: Finished difference Result 81 states and 130 transitions. [2020-10-27 19:46:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:46:04,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 19:46:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:05,005 INFO L225 Difference]: With dead ends: 81 [2020-10-27 19:46:05,006 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 19:46:05,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 19:46:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 19:46:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 19:46:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-10-27 19:46:05,062 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 13 [2020-10-27 19:46:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:05,063 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-10-27 19:46:05,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:46:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-10-27 19:46:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:05,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:05,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:05,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:05,065 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:05,066 INFO L82 PathProgramCache]: Analyzing trace with hash -99622447, now seen corresponding path program 1 times [2020-10-27 19:46:05,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:05,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396330645] [2020-10-27 19:46:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:05,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:05,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 19:46:05,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:05,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:05,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:46:05,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:05,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:05,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:46:05,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:05,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:05,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:05,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:05,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396330645] [2020-10-27 19:46:05,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:05,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:05,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120007327] [2020-10-27 19:46:05,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:05,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:05,510 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-10-27 19:46:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:05,705 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2020-10-27 19:46:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:05,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 19:46:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:05,707 INFO L225 Difference]: With dead ends: 61 [2020-10-27 19:46:05,707 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:46:05,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:46:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-27 19:46:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 19:46:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-10-27 19:46:05,719 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2020-10-27 19:46:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:05,719 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-10-27 19:46:05,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-10-27 19:46:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:05,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:05,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:05,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:05,721 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash -693165697, now seen corresponding path program 1 times [2020-10-27 19:46:05,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:05,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186418652] [2020-10-27 19:46:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:05,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:05,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:05,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:05,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:05,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-27 19:46:05,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:05,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:05,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:05,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:46:05,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:06,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:06,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:06,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:06,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:06,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:06,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:06,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:06,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186418652] [2020-10-27 19:46:06,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:06,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:46:06,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033243254] [2020-10-27 19:46:06,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:06,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:06,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:06,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:06,097 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 6 states. [2020-10-27 19:46:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:06,345 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2020-10-27 19:46:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:06,346 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 19:46:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:06,348 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:46:06,348 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:46:06,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:46:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2020-10-27 19:46:06,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 19:46:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-27 19:46:06,358 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2020-10-27 19:46:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:06,358 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-27 19:46:06,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-27 19:46:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:06,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:06,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:06,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:06,361 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:06,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1228587689, now seen corresponding path program 1 times [2020-10-27 19:46:06,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:06,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431072061] [2020-10-27 19:46:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:06,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:06,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:07,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:09,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:09,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:46:09,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3002 [2020-10-27 19:46:09,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:09,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:09,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 19:46:09,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:09,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:09,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:09,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:09,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:09,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:09,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:09,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:09,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:46:09,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431072061] [2020-10-27 19:46:09,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:09,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:09,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403213685] [2020-10-27 19:46:09,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:09,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:09,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:09,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:09,495 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2020-10-27 19:46:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:09,677 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-27 19:46:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:09,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-27 19:46:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:09,678 INFO L225 Difference]: With dead ends: 54 [2020-10-27 19:46:09,678 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 19:46:09,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 19:46:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 19:46:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:46:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-27 19:46:09,686 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2020-10-27 19:46:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:09,686 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-27 19:46:09,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-27 19:46:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:09,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:09,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:09,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:09,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:09,688 INFO L82 PathProgramCache]: Analyzing trace with hash -527523111, now seen corresponding path program 1 times [2020-10-27 19:46:09,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:09,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188667504] [2020-10-27 19:46:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:09,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:10,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:10,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:10,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-27 19:46:10,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:10,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:10,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:46:10,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:46:10,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:10,762 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-27 19:46:10,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:10,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:10,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:10,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:10,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:10,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:10,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:10,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:10,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188667504] [2020-10-27 19:46:10,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:10,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:10,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499573414] [2020-10-27 19:46:10,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:10,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:10,920 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 11 states. [2020-10-27 19:46:11,292 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-27 19:46:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:11,869 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-10-27 19:46:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:46:11,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 19:46:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:11,871 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:46:11,872 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 19:46:11,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:46:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 19:46:11,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 58. [2020-10-27 19:46:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 19:46:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2020-10-27 19:46:11,890 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 26 [2020-10-27 19:46:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:11,890 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2020-10-27 19:46:11,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2020-10-27 19:46:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:11,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:11,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:11,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:11,892 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2045311253, now seen corresponding path program 1 times [2020-10-27 19:46:11,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:11,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758980641] [2020-10-27 19:46:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:11,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:11,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:12,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:12,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-27 19:46:12,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:12,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:12,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:13,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:13,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 19:46:13,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:13,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:13,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758980641] [2020-10-27 19:46:13,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:13,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:13,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385123470] [2020-10-27 19:46:13,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:13,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:13,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:13,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:13,273 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 11 states. [2020-10-27 19:46:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:13,985 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-27 19:46:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:13,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 19:46:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:13,987 INFO L225 Difference]: With dead ends: 96 [2020-10-27 19:46:13,988 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 19:46:13,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:46:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 19:46:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-27 19:46:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 19:46:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2020-10-27 19:46:14,008 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 26 [2020-10-27 19:46:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:14,009 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2020-10-27 19:46:14,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2020-10-27 19:46:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:14,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:14,012 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:14,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:14,012 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash 147695768, now seen corresponding path program 2 times [2020-10-27 19:46:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:14,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213540940] [2020-10-27 19:46:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:14,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:14,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:14,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:14,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 19:46:14,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:14,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:14,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:14,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:14,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:14,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:14,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:14,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:14,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:14,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:46:14,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213540940] [2020-10-27 19:46:14,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:14,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:14,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424836556] [2020-10-27 19:46:14,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:14,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:14,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:14,517 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 6 states. [2020-10-27 19:46:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:14,940 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-10-27 19:46:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:14,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 19:46:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:14,942 INFO L225 Difference]: With dead ends: 111 [2020-10-27 19:46:14,942 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 19:46:14,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 19:46:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-27 19:46:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 19:46:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-10-27 19:46:14,953 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 27 [2020-10-27 19:46:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:14,953 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-10-27 19:46:14,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-10-27 19:46:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:14,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:14,955 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:14,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:14,955 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1698817572, now seen corresponding path program 2 times [2020-10-27 19:46:14,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:14,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258640484] [2020-10-27 19:46:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:15,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:15,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:15,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:15,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-27 19:46:15,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:15,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:46:15,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:16,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:16,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:16,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:16,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:16,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:16,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:16,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:16,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:16,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258640484] [2020-10-27 19:46:16,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:16,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:16,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681683835] [2020-10-27 19:46:16,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:16,030 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 12 states. [2020-10-27 19:46:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:17,186 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-27 19:46:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:46:17,187 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 19:46:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:17,188 INFO L225 Difference]: With dead ends: 132 [2020-10-27 19:46:17,188 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 19:46:17,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:46:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 19:46:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-10-27 19:46:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 19:46:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-10-27 19:46:17,203 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 27 [2020-10-27 19:46:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:17,203 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-10-27 19:46:17,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-10-27 19:46:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:17,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:17,205 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, 1, 1, 1, 1] [2020-10-27 19:46:17,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:17,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1696970530, now seen corresponding path program 1 times [2020-10-27 19:46:17,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:17,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058843447] [2020-10-27 19:46:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:17,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:17,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:17,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-27 19:46:17,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 19:46:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:17,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:17,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:17,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:17,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:17,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:17,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:17,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:17,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:17,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:17,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:46:17,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058843447] [2020-10-27 19:46:17,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:17,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:17,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821169588] [2020-10-27 19:46:17,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:17,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:17,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:17,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:17,801 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 4 states. [2020-10-27 19:46:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:17,950 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2020-10-27 19:46:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:17,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 19:46:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:17,953 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:46:17,953 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 19:46:17,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 19:46:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-27 19:46:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 19:46:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-10-27 19:46:17,972 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 27 [2020-10-27 19:46:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:17,975 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-10-27 19:46:17,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-10-27 19:46:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:46:17,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:17,978 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:17,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:17,979 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1802694155, now seen corresponding path program 3 times [2020-10-27 19:46:17,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:17,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434406387] [2020-10-27 19:46:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:18,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:46:18,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:18,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-27 19:46:18,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:46:18,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:18,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:18,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:18,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:18,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:18,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:18,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434406387] [2020-10-27 19:46:18,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:18,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:18,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575129770] [2020-10-27 19:46:18,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:18,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:18,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:18,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:18,510 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 9 states. [2020-10-27 19:46:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:19,323 INFO L93 Difference]: Finished difference Result 167 states and 210 transitions. [2020-10-27 19:46:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:19,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-27 19:46:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:19,325 INFO L225 Difference]: With dead ends: 167 [2020-10-27 19:46:19,326 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 19:46:19,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 19:46:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2020-10-27 19:46:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 19:46:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2020-10-27 19:46:19,339 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 28 [2020-10-27 19:46:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:19,339 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2020-10-27 19:46:19,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2020-10-27 19:46:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:19,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:19,341 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:19,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:19,341 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1487828979, now seen corresponding path program 1 times [2020-10-27 19:46:19,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:19,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178795908] [2020-10-27 19:46:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:19,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:19,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:19,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:19,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-27 19:46:19,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:19,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:46:19,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:20,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:20,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:20,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:20,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:20,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:20,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:20,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:20,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:20,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:20,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178795908] [2020-10-27 19:46:20,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:20,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:20,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599131498] [2020-10-27 19:46:20,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:20,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:20,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:20,285 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand 13 states. [2020-10-27 19:46:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:20,909 INFO L93 Difference]: Finished difference Result 139 states and 170 transitions. [2020-10-27 19:46:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:46:20,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-27 19:46:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:20,911 INFO L225 Difference]: With dead ends: 139 [2020-10-27 19:46:20,911 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 19:46:20,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:46:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 19:46:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2020-10-27 19:46:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 19:46:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2020-10-27 19:46:20,928 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 29 [2020-10-27 19:46:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:20,929 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2020-10-27 19:46:20,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2020-10-27 19:46:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:20,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:20,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:20,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:20,931 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:20,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash -358684361, now seen corresponding path program 1 times [2020-10-27 19:46:20,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:20,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816569365] [2020-10-27 19:46:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:23,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:23,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:23,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2413 [2020-10-27 19:46:23,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:23,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:23,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:23,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:46:23,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:23,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:23,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:23,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:23,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:23,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:23,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:23,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816569365] [2020-10-27 19:46:23,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:23,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:23,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797989123] [2020-10-27 19:46:23,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:23,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:23,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:23,663 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 12 states. [2020-10-27 19:46:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:24,505 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2020-10-27 19:46:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:46:24,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 19:46:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:24,507 INFO L225 Difference]: With dead ends: 142 [2020-10-27 19:46:24,507 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 19:46:24,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:46:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 19:46:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 98. [2020-10-27 19:46:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 19:46:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-10-27 19:46:24,525 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 29 [2020-10-27 19:46:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:24,526 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-10-27 19:46:24,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-10-27 19:46:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:24,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:24,531 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:24,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:24,531 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash 386573699, now seen corresponding path program 2 times [2020-10-27 19:46:24,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:24,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298114144] [2020-10-27 19:46:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:25,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:25,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:25,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1414 [2020-10-27 19:46:25,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:25,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:46:25,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:25,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:25,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,388 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-10-27 19:46:26,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:26,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:26,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:26,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:26,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:26,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298114144] [2020-10-27 19:46:26,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:26,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:26,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101401361] [2020-10-27 19:46:26,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:26,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:26,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:26,676 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 13 states. [2020-10-27 19:46:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:28,237 INFO L93 Difference]: Finished difference Result 204 states and 252 transitions. [2020-10-27 19:46:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:46:28,238 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 19:46:28,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:28,240 INFO L225 Difference]: With dead ends: 204 [2020-10-27 19:46:28,241 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 19:46:28,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:46:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 19:46:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 118. [2020-10-27 19:46:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 19:46:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2020-10-27 19:46:28,255 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 32 [2020-10-27 19:46:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:28,255 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2020-10-27 19:46:28,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2020-10-27 19:46:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:28,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:28,256 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:28,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:28,256 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2065034576, now seen corresponding path program 1 times [2020-10-27 19:46:28,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:28,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206433273] [2020-10-27 19:46:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:29,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:29,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:29,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-10-27 19:46:29,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 19:46:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:29,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:29,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:29,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:29,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:29,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:29,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:29,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:29,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:46:29,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206433273] [2020-10-27 19:46:29,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:29,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:29,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502779610] [2020-10-27 19:46:29,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:29,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:29,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:29,875 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 6 states. [2020-10-27 19:46:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:30,166 INFO L93 Difference]: Finished difference Result 135 states and 169 transitions. [2020-10-27 19:46:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:30,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 19:46:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:30,168 INFO L225 Difference]: With dead ends: 135 [2020-10-27 19:46:30,168 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 19:46:30,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 19:46:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 19:46:30,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:46:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2020-10-27 19:46:30,189 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 33 [2020-10-27 19:46:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:30,189 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2020-10-27 19:46:30,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2020-10-27 19:46:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:30,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:30,192 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:30,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:46:30,192 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1255687950, now seen corresponding path program 1 times [2020-10-27 19:46:30,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:30,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209895723] [2020-10-27 19:46:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:30,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:30,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:30,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-27 19:46:30,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:30,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:46:30,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:46:30,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:30,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:30,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:30,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:30,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209895723] [2020-10-27 19:46:30,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:30,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:46:30,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166394885] [2020-10-27 19:46:30,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:30,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:30,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:30,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:30,939 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand 7 states. [2020-10-27 19:46:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:31,266 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2020-10-27 19:46:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:31,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-27 19:46:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:31,268 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:46:31,269 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 19:46:31,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 19:46:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 130. [2020-10-27 19:46:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 19:46:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2020-10-27 19:46:31,283 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 33 [2020-10-27 19:46:31,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:31,283 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2020-10-27 19:46:31,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:31,283 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2020-10-27 19:46:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:31,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:31,284 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:31,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:46:31,284 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1580074194, now seen corresponding path program 3 times [2020-10-27 19:46:31,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:31,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602998435] [2020-10-27 19:46:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:31,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:32,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:32,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-27 19:46:32,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:32,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:32,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:46:32,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,585 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-27 19:46:32,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:32,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:32,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:32,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602998435] [2020-10-27 19:46:32,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:32,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573556016] [2020-10-27 19:46:32,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:32,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:32,848 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand 13 states. [2020-10-27 19:46:34,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:34,264 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2020-10-27 19:46:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:46:34,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:46:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:34,266 INFO L225 Difference]: With dead ends: 226 [2020-10-27 19:46:34,266 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 19:46:34,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:46:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 19:46:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 137. [2020-10-27 19:46:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 19:46:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2020-10-27 19:46:34,289 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 33 [2020-10-27 19:46:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:34,290 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2020-10-27 19:46:34,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2020-10-27 19:46:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:34,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:34,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:34,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:46:34,293 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2031918101, now seen corresponding path program 1 times [2020-10-27 19:46:34,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:34,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652161018] [2020-10-27 19:46:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:34,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:37,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:39,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:39,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 19:46:39,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 19:46:39,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:39,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 19:46:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:39,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:39,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:39,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:39,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:39,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:39,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:39,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:39,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652161018] [2020-10-27 19:46:39,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:39,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:39,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304306499] [2020-10-27 19:46:39,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:39,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:39,883 INFO L87 Difference]: Start difference. First operand 137 states and 169 transitions. Second operand 13 states. [2020-10-27 19:46:40,720 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-27 19:46:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:41,151 INFO L93 Difference]: Finished difference Result 209 states and 256 transitions. [2020-10-27 19:46:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:46:41,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-27 19:46:41,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:41,153 INFO L225 Difference]: With dead ends: 209 [2020-10-27 19:46:41,154 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 19:46:41,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:46:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 19:46:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-27 19:46:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 19:46:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2020-10-27 19:46:41,171 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 34 [2020-10-27 19:46:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:41,171 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2020-10-27 19:46:41,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2020-10-27 19:46:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:41,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:41,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:41,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:46:41,173 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1453702569, now seen corresponding path program 1 times [2020-10-27 19:46:41,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:41,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239035318] [2020-10-27 19:46:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:41,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:42,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:45,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:45,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:46:45,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3859 [2020-10-27 19:46:45,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 19:46:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:46:45,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:45,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:45,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:45,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:45,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:45,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:45,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:45,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:45,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:45,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:46:45,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239035318] [2020-10-27 19:46:45,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:45,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:46:45,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87191161] [2020-10-27 19:46:45,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:45,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:45,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:45,142 INFO L87 Difference]: Start difference. First operand 141 states and 176 transitions. Second operand 7 states. [2020-10-27 19:46:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:45,460 INFO L93 Difference]: Finished difference Result 170 states and 208 transitions. [2020-10-27 19:46:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:45,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-27 19:46:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:45,464 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:46:45,464 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 19:46:45,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 19:46:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2020-10-27 19:46:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 19:46:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2020-10-27 19:46:45,479 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 34 [2020-10-27 19:46:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:45,479 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2020-10-27 19:46:45,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2020-10-27 19:46:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:45,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:45,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:45,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:46:45,480 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1711868007, now seen corresponding path program 2 times [2020-10-27 19:46:45,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:45,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523140361] [2020-10-27 19:46:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:45,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:47,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:47,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:47,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:46:47,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2271 [2020-10-27 19:46:47,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:47,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:47,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:47,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:46:47,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:47,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:47,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:47,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:47,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:47,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:47,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:46:47,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523140361] [2020-10-27 19:46:47,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:47,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:47,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857257422] [2020-10-27 19:46:47,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:47,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:47,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:47,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:47,950 INFO L87 Difference]: Start difference. First operand 146 states and 181 transitions. Second operand 11 states. [2020-10-27 19:46:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:48,541 INFO L93 Difference]: Finished difference Result 203 states and 244 transitions. [2020-10-27 19:46:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:46:48,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 19:46:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:48,543 INFO L225 Difference]: With dead ends: 203 [2020-10-27 19:46:48,544 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 19:46:48,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:46:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 19:46:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 153. [2020-10-27 19:46:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 19:46:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 188 transitions. [2020-10-27 19:46:48,560 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 188 transitions. Word has length 34 [2020-10-27 19:46:48,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:48,561 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 188 transitions. [2020-10-27 19:46:48,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 188 transitions. [2020-10-27 19:46:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:48,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:48,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:48,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:46:48,562 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:48,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1334955380, now seen corresponding path program 1 times [2020-10-27 19:46:48,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:48,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876612492] [2020-10-27 19:46:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:48,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:49,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:49,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:49,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-27 19:46:49,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:49,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:49,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:49,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:46:49,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:49,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:49,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:49,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:49,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:49,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:49,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:49,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:49,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:49,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:46:49,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876612492] [2020-10-27 19:46:49,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:49,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:49,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194883397] [2020-10-27 19:46:49,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:49,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:49,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:49,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:49,358 INFO L87 Difference]: Start difference. First operand 153 states and 188 transitions. Second operand 8 states. [2020-10-27 19:46:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:49,890 INFO L93 Difference]: Finished difference Result 209 states and 254 transitions. [2020-10-27 19:46:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:49,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 19:46:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:49,892 INFO L225 Difference]: With dead ends: 209 [2020-10-27 19:46:49,892 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 19:46:49,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 19:46:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-27 19:46:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 19:46:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 198 transitions. [2020-10-27 19:46:49,908 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 198 transitions. Word has length 34 [2020-10-27 19:46:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:49,909 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 198 transitions. [2020-10-27 19:46:49,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 198 transitions. [2020-10-27 19:46:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:49,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:49,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:49,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:46:49,910 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:49,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:49,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1237878984, now seen corresponding path program 1 times [2020-10-27 19:46:49,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:49,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015296594] [2020-10-27 19:46:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:49,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:51,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:51,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:46:51,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1868 [2020-10-27 19:46:51,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:46:51,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:52,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:52,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:52,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:52,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:52,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:52,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:52,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:52,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:46:52,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015296594] [2020-10-27 19:46:52,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:52,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:52,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780682773] [2020-10-27 19:46:52,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:52,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:52,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:52,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:52,205 INFO L87 Difference]: Start difference. First operand 163 states and 198 transitions. Second operand 12 states. [2020-10-27 19:46:52,575 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-27 19:46:52,831 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 19:46:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:53,655 INFO L93 Difference]: Finished difference Result 224 states and 270 transitions. [2020-10-27 19:46:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:46:53,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 19:46:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:53,657 INFO L225 Difference]: With dead ends: 224 [2020-10-27 19:46:53,657 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 19:46:53,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:46:53,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 19:46:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-27 19:46:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 19:46:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 201 transitions. [2020-10-27 19:46:53,675 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 201 transitions. Word has length 34 [2020-10-27 19:46:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:53,676 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 201 transitions. [2020-10-27 19:46:53,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 201 transitions. [2020-10-27 19:46:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:53,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:53,677 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:53,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:46:53,677 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:53,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1986251000, now seen corresponding path program 4 times [2020-10-27 19:46:53,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:53,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640129264] [2020-10-27 19:46:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:53,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:57,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:57,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:57,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3637 [2020-10-27 19:46:57,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:57,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:46:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:46:57,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:57,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:57,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:57,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:57,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:57,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:57,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:57,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:57,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:57,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:57,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:57,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640129264] [2020-10-27 19:46:57,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:57,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:46:57,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845184257] [2020-10-27 19:46:57,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:46:57,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:46:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:57,974 INFO L87 Difference]: Start difference. First operand 166 states and 201 transitions. Second operand 14 states. [2020-10-27 19:46:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:59,450 INFO L93 Difference]: Finished difference Result 284 states and 343 transitions. [2020-10-27 19:46:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:46:59,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 19:46:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:59,456 INFO L225 Difference]: With dead ends: 284 [2020-10-27 19:46:59,456 INFO L226 Difference]: Without dead ends: 265 [2020-10-27 19:46:59,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:46:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-27 19:46:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 186. [2020-10-27 19:46:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 19:46:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 227 transitions. [2020-10-27 19:46:59,491 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 227 transitions. Word has length 34 [2020-10-27 19:46:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:59,491 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 227 transitions. [2020-10-27 19:46:59,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:46:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 227 transitions. [2020-10-27 19:46:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:59,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:59,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:59,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:46:59,494 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -959414135, now seen corresponding path program 2 times [2020-10-27 19:46:59,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:59,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138082492] [2020-10-27 19:46:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:59,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:59,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:00,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:47:00,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1234 [2020-10-27 19:47:00,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:00,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:47:00,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:01,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:01,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:01,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:01,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:01,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:01,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:01,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:01,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:01,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138082492] [2020-10-27 19:47:01,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:01,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:01,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837868065] [2020-10-27 19:47:01,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:01,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:01,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:01,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:01,102 INFO L87 Difference]: Start difference. First operand 186 states and 227 transitions. Second operand 14 states. [2020-10-27 19:47:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:02,321 INFO L93 Difference]: Finished difference Result 258 states and 312 transitions. [2020-10-27 19:47:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:47:02,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 19:47:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:02,323 INFO L225 Difference]: With dead ends: 258 [2020-10-27 19:47:02,323 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 19:47:02,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:47:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 19:47:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 200. [2020-10-27 19:47:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 19:47:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 246 transitions. [2020-10-27 19:47:02,365 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 246 transitions. Word has length 35 [2020-10-27 19:47:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:02,366 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 246 transitions. [2020-10-27 19:47:02,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:02,366 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 246 transitions. [2020-10-27 19:47:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:47:02,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:02,367 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:02,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:47:02,367 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:02,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2123195831, now seen corresponding path program 5 times [2020-10-27 19:47:02,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:02,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867623813] [2020-10-27 19:47:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:02,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:04,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:47:04,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:04,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2481 [2020-10-27 19:47:04,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:04,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:47:04,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:04,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:04,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:05,054 ERROR L253 erpolLogProxyWrapper]: Interpolant 25 not inductive [2020-10-27 19:47:05,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:47:05,056 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 19:47:05,061 INFO L168 Benchmark]: Toolchain (without parser) took 62710.53 ms. Allocated memory was 125.8 MB in the beginning and 830.5 MB in the end (delta: 704.6 MB). Free memory was 99.8 MB in the beginning and 448.4 MB in the end (delta: -348.6 MB). Peak memory consumption was 414.2 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:05,061 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 19:47:05,062 INFO L168 Benchmark]: CACSL2BoogieTranslator took 537.10 ms. Allocated memory is still 125.8 MB. Free memory was 99.0 MB in the beginning and 76.7 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:05,062 INFO L168 Benchmark]: Boogie Preprocessor took 88.07 ms. Allocated memory was 125.8 MB in the beginning and 155.2 MB in the end (delta: 29.4 MB). Free memory was 76.7 MB in the beginning and 137.5 MB in the end (delta: -60.8 MB). Peak memory consumption was 8.0 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:05,063 INFO L168 Benchmark]: RCFGBuilder took 973.81 ms. Allocated memory is still 155.2 MB. Free memory was 137.4 MB in the beginning and 90.7 MB in the end (delta: 46.8 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:05,063 INFO L168 Benchmark]: TraceAbstraction took 61096.26 ms. Allocated memory was 155.2 MB in the beginning and 830.5 MB in the end (delta: 675.3 MB). Free memory was 90.2 MB in the beginning and 448.4 MB in the end (delta: -358.2 MB). Peak memory consumption was 374.7 MB. Max. memory is 8.0 GB. [2020-10-27 19:47:05,066 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 537.10 ms. Allocated memory is still 125.8 MB. Free memory was 99.0 MB in the beginning and 76.7 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.07 ms. Allocated memory was 125.8 MB in the beginning and 155.2 MB in the end (delta: 29.4 MB). Free memory was 76.7 MB in the beginning and 137.5 MB in the end (delta: -60.8 MB). Peak memory consumption was 8.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 973.81 ms. Allocated memory is still 155.2 MB. Free memory was 137.4 MB in the beginning and 90.7 MB in the end (delta: 46.8 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 61096.26 ms. Allocated memory was 155.2 MB in the beginning and 830.5 MB in the end (delta: 675.3 MB). Free memory was 90.2 MB in the beginning and 448.4 MB in the end (delta: -358.2 MB). Peak memory consumption was 374.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...