/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=SHALLOWEST --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-sorted-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:05:20,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:05:20,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:05:20,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:05:20,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:05:20,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:05:20,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:05:20,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:05:20,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:05:20,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:05:20,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:05:20,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:05:20,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:05:20,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:05:20,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:05:20,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:05:20,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:05:20,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:05:20,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:05:20,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:05:20,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:05:20,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:05:20,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:05:20,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:05:20,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:05:20,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:05:20,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:05:20,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:05:20,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:05:20,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:05:20,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:05:20,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:05:20,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:05:20,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:05:20,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:05:20,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:05:20,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:05:20,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:05:20,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:05:20,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:05:20,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:05:20,513 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 01:05:20,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:05:20,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:05:20,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:05:20,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:05:20,571 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:05:20,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:05:20,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:05:20,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:05:20,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:05:20,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:05:20,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:05:20,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:05:20,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:05:20,574 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:05:20,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:05:20,574 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:05:20,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:05:20,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:05:20,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:05:20,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:05:20,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:05:20,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:20,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:05:20,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:05:20,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:05:20,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:05:20,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:05:20,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:05:20,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:05:20,577 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:05:20,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:05:21,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:05:21,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:05:21,026 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:05:21,027 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:05:21,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-sorted-2.i [2020-10-27 01:05:21,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08aa2391b/287713fdf9c34a099e7a7b0d32ca71fb/FLAG69a24e98c [2020-10-27 01:05:21,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:05:21,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-sorted-2.i [2020-10-27 01:05:21,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08aa2391b/287713fdf9c34a099e7a7b0d32ca71fb/FLAG69a24e98c [2020-10-27 01:05:22,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08aa2391b/287713fdf9c34a099e7a7b0d32ca71fb [2020-10-27 01:05:22,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:05:22,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:05:22,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:22,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:05:22,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:05:22,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8f6b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22, skipping insertion in model container [2020-10-27 01:05:22,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:05:22,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:05:22,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:22,599 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:05:22,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:22,782 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:05:22,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22 WrapperNode [2020-10-27 01:05:22,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:22,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:05:22,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:05:22,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:05:22,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (1/1) ... [2020-10-27 01:05:22,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:05:22,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:05:22,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:05:22,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:05:22,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (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 01:05:23,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:05:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:05:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:05:23,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:05:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:05:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:05:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:05:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:05:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:05:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:05:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:05:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:05:23,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:05:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:05:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:05:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:05:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:05:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:05:23,046 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:05:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:05:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:05:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:05:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:05:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:05:23,047 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:05:23,048 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:05:23,048 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:05:23,048 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:05:23,048 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:05:23,048 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:05:23,048 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:05:23,048 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:05:23,049 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:05:23,049 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:05:23,049 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:05:23,049 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:05:23,049 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:05:23,049 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:05:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:05:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:05:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:05:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:05:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:05:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:05:23,050 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:05:23,051 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:05:23,051 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:05:23,051 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:05:23,051 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:05:23,051 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:05:23,051 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:05:23,051 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:05:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:05:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:05:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:05:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:05:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:05:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:05:23,052 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:05:23,053 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:05:23,053 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:05:23,053 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:05:23,053 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:05:23,053 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:05:23,053 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:05:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:05:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:05:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:05:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:05:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:05:23,054 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:05:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:05:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:05:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:05:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:05:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:05:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:05:23,055 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:05:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:05:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:05:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:05:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:05:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:05:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:05:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:05:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:05:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:05:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:05:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:05:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:05:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:05:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:05:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:05:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:05:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:05:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:05:23,058 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:05:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:05:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:05:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:05:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:05:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:05:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:05:23,059 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:05:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:05:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:05:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:05:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:05:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:05:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:05:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:05:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:05:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:05:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:05:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:05:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:05:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:05:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:05:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:05:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:05:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:05:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:05:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:05:23,929 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:05:23,930 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-27 01:05:23,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:23 BoogieIcfgContainer [2020-10-27 01:05:23,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:05:23,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:05:23,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:05:23,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:05:23,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:05:22" (1/3) ... [2020-10-27 01:05:23,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b4f92c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:23, skipping insertion in model container [2020-10-27 01:05:23,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:22" (2/3) ... [2020-10-27 01:05:23,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b4f92c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:23, skipping insertion in model container [2020-10-27 01:05:23,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:23" (3/3) ... [2020-10-27 01:05:23,942 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-sorted-2.i [2020-10-27 01:05:23,954 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:05:23,959 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:05:23,973 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:05:24,002 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:05:24,002 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:05:24,002 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:05:24,002 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:05:24,002 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:05:24,003 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:05:24,003 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:05:24,003 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:05:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-27 01:05:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:05:24,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:24,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:24,030 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1889217750, now seen corresponding path program 1 times [2020-10-27 01:05:24,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:24,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323508096] [2020-10-27 01:05:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 01:05:24,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:24,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-27 01:05:24,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:24,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:24,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:05:24,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:24,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:24,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:24,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:24,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:24,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:05:24,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:24,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:24,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:24,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:24,834 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 01:05:24,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323508096] [2020-10-27 01:05:24,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:24,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:24,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534272149] [2020-10-27 01:05:24,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:24,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:24,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:24,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:24,870 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-10-27 01:05:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:25,223 INFO L93 Difference]: Finished difference Result 147 states and 257 transitions. [2020-10-27 01:05:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:25,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-27 01:05:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:25,235 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:05:25,235 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:05:25,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:05:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-10-27 01:05:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:05:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-10-27 01:05:25,291 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 12 [2020-10-27 01:05:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:25,292 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-10-27 01:05:25,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-10-27 01:05:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:05:25,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:25,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:25,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:05:25,294 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:25,295 INFO L82 PathProgramCache]: Analyzing trace with hash -825144030, now seen corresponding path program 1 times [2020-10-27 01:05:25,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:25,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940896554] [2020-10-27 01:05:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:25,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:05:25,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:25,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-27 01:05:25,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:25,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:25,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:25,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:25,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:25,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:25,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:25,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:25,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:25,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:25,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:25,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:25,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:25,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:25,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:25,974 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 01:05:25,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940896554] [2020-10-27 01:05:25,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:25,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:25,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032737833] [2020-10-27 01:05:25,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:25,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:25,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:25,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:25,979 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 4 states. [2020-10-27 01:05:26,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:26,200 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2020-10-27 01:05:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:26,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 01:05:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:26,204 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:05:26,204 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:05:26,207 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 01:05:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:05:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 01:05:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:05:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-10-27 01:05:26,234 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2020-10-27 01:05:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:26,234 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-10-27 01:05:26,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-10-27 01:05:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:26,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:26,240 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 01:05:26,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:05:26,241 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash -911494601, now seen corresponding path program 1 times [2020-10-27 01:05:26,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:26,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453643485] [2020-10-27 01:05:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:26,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-27 01:05:26,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:26,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:26,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:26,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:26,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:26,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:05:26,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:26,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:26,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:26,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453643485] [2020-10-27 01:05:26,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:26,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:26,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390016262] [2020-10-27 01:05:26,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:26,999 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 9 states. [2020-10-27 01:05:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:27,683 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2020-10-27 01:05:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:27,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:05:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:27,685 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:05:27,685 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:05:27,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:05:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:05:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2020-10-27 01:05:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:05:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2020-10-27 01:05:27,699 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 27 [2020-10-27 01:05:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:27,700 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2020-10-27 01:05:27,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2020-10-27 01:05:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:05:27,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:27,701 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] [2020-10-27 01:05:27,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:05:27,702 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1161269986, now seen corresponding path program 1 times [2020-10-27 01:05:27,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:27,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941882343] [2020-10-27 01:05:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:27,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:27,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:28,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:28,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:28,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:05:28,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:28,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-27 01:05:28,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:28,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:29,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:29,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:29,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:29,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:29,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:29,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:29,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:29,166 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 01:05:29,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941882343] [2020-10-27 01:05:29,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:29,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:29,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030228166] [2020-10-27 01:05:29,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:29,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:29,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:29,169 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand 9 states. [2020-10-27 01:05:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:29,783 INFO L93 Difference]: Finished difference Result 133 states and 176 transitions. [2020-10-27 01:05:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:05:29,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 01:05:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:29,787 INFO L225 Difference]: With dead ends: 133 [2020-10-27 01:05:29,787 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:05:29,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:05:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:05:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2020-10-27 01:05:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:05:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2020-10-27 01:05:29,815 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 30 [2020-10-27 01:05:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:29,815 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2020-10-27 01:05:29,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2020-10-27 01:05:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:05:29,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:29,823 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:29,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:05:29,824 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:29,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1694431754, now seen corresponding path program 1 times [2020-10-27 01:05:29,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:29,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106136109] [2020-10-27 01:05:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:29,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:29,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:30,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:05:30,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:30,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-10-27 01:05:30,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:05:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:30,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:30,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:30,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:30,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:30,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:30,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:30,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:30,997 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 01:05:30,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106136109] [2020-10-27 01:05:30,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:30,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:30,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864114223] [2020-10-27 01:05:30,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:30,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:31,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:31,000 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand 10 states. [2020-10-27 01:05:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:31,775 INFO L93 Difference]: Finished difference Result 172 states and 225 transitions. [2020-10-27 01:05:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:31,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 01:05:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:31,778 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:05:31,778 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 01:05:31,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 01:05:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-27 01:05:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:05:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2020-10-27 01:05:31,794 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 31 [2020-10-27 01:05:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:31,795 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2020-10-27 01:05:31,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2020-10-27 01:05:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:05:31,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:31,797 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:31,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:05:31,797 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:31,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:31,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1301404744, now seen corresponding path program 1 times [2020-10-27 01:05:31,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:31,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738656001] [2020-10-27 01:05:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:31,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:05:33,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:33,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-10-27 01:05:33,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:33,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:33,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:05:33,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:33,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:33,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:33,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:33,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:33,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,490 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 01:05:33,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738656001] [2020-10-27 01:05:33,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:33,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:33,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309037103] [2020-10-27 01:05:33,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:33,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:33,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:33,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:33,494 INFO L87 Difference]: Start difference. First operand 93 states and 121 transitions. Second operand 9 states. [2020-10-27 01:05:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:33,843 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2020-10-27 01:05:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:33,843 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 01:05:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:33,844 INFO L225 Difference]: With dead ends: 150 [2020-10-27 01:05:33,845 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:05:33,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:05:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2020-10-27 01:05:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:05:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-10-27 01:05:33,858 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 31 [2020-10-27 01:05:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:33,858 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-10-27 01:05:33,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-10-27 01:05:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:05:33,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:33,860 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:33,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:05:33,861 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1475577036, now seen corresponding path program 2 times [2020-10-27 01:05:33,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:33,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116658175] [2020-10-27 01:05:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:05:34,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-27 01:05:34,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:34,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:34,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:05:34,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:34,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:34,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:34,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:34,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,686 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 01:05:34,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116658175] [2020-10-27 01:05:34,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:34,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:34,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549555841] [2020-10-27 01:05:34,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:34,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:34,689 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand 11 states. [2020-10-27 01:05:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:35,738 INFO L93 Difference]: Finished difference Result 164 states and 212 transitions. [2020-10-27 01:05:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:05:35,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:05:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:35,741 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:05:35,741 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 01:05:35,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:05:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 01:05:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 111. [2020-10-27 01:05:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 01:05:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 143 transitions. [2020-10-27 01:05:35,764 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 143 transitions. Word has length 31 [2020-10-27 01:05:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:35,764 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 143 transitions. [2020-10-27 01:05:35,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 143 transitions. [2020-10-27 01:05:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:05:35,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:35,767 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 01:05:35,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:05:35,767 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:35,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1036867019, now seen corresponding path program 1 times [2020-10-27 01:05:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:35,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350759292] [2020-10-27 01:05:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:05:40,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:05:40,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4337 [2020-10-27 01:05:40,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:05:40,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:40,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:40,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:40,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:05:40,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:40,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:40,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:05:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:05:40,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350759292] [2020-10-27 01:05:40,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:40,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 01:05:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989989398] [2020-10-27 01:05:40,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:40,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:40,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:40,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:40,403 INFO L87 Difference]: Start difference. First operand 111 states and 143 transitions. Second operand 11 states. [2020-10-27 01:05:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:41,182 INFO L93 Difference]: Finished difference Result 186 states and 241 transitions. [2020-10-27 01:05:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:05:41,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:05:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:41,185 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:05:41,185 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:05:41,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:05:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 122. [2020-10-27 01:05:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:05:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 159 transitions. [2020-10-27 01:05:41,199 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 159 transitions. Word has length 33 [2020-10-27 01:05:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:41,199 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 159 transitions. [2020-10-27 01:05:41,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:41,199 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 159 transitions. [2020-10-27 01:05:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:05:41,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:41,201 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 01:05:41,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:05:41,201 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:41,202 INFO L82 PathProgramCache]: Analyzing trace with hash 643840009, now seen corresponding path program 1 times [2020-10-27 01:05:41,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:41,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755292536] [2020-10-27 01:05:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:41,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:41,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:05:41,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:41,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-27 01:05:41,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:41,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:41,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:41,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:41,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:42,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:42,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:42,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:42,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:42,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:42,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755292536] [2020-10-27 01:05:42,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:42,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:42,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769096060] [2020-10-27 01:05:42,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:42,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:42,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:42,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:42,439 INFO L87 Difference]: Start difference. First operand 122 states and 159 transitions. Second operand 11 states. [2020-10-27 01:05:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:43,627 INFO L93 Difference]: Finished difference Result 223 states and 289 transitions. [2020-10-27 01:05:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:43,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:05:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:43,634 INFO L225 Difference]: With dead ends: 223 [2020-10-27 01:05:43,634 INFO L226 Difference]: Without dead ends: 219 [2020-10-27 01:05:43,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-27 01:05:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 140. [2020-10-27 01:05:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:05:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-10-27 01:05:43,665 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 33 [2020-10-27 01:05:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:43,668 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-10-27 01:05:43,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-10-27 01:05:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:05:43,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:43,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:43,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:05:43,674 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2146266711, now seen corresponding path program 2 times [2020-10-27 01:05:43,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:43,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265033753] [2020-10-27 01:05:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:44,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:05:44,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:44,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-27 01:05:44,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:44,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:05:44,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:44,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:44,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:44,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:44,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:44,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:44,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:44,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:44,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:44,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:44,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:05:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:44,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265033753] [2020-10-27 01:05:44,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:44,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:44,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891984439] [2020-10-27 01:05:44,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:44,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:44,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:44,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:44,495 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 9 states. [2020-10-27 01:05:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:45,110 INFO L93 Difference]: Finished difference Result 196 states and 258 transitions. [2020-10-27 01:05:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:45,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 01:05:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:45,112 INFO L225 Difference]: With dead ends: 196 [2020-10-27 01:05:45,113 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 01:05:45,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:05:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 01:05:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2020-10-27 01:05:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:05:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2020-10-27 01:05:45,131 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 33 [2020-10-27 01:05:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:45,132 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2020-10-27 01:05:45,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2020-10-27 01:05:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:05:45,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:45,134 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:45,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:05:45,134 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:45,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:45,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1515530705, now seen corresponding path program 1 times [2020-10-27 01:05:45,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:45,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530037352] [2020-10-27 01:05:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:05:45,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:45,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-27 01:05:45,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:05:45,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:46,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:46,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:46,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:46,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:46,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530037352] [2020-10-27 01:05:46,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:46,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:46,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609436782] [2020-10-27 01:05:46,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:46,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:46,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:46,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:46,212 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand 11 states. [2020-10-27 01:05:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:47,520 INFO L93 Difference]: Finished difference Result 190 states and 246 transitions. [2020-10-27 01:05:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:05:47,521 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 01:05:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:47,523 INFO L225 Difference]: With dead ends: 190 [2020-10-27 01:05:47,524 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:05:47,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:05:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 152. [2020-10-27 01:05:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 01:05:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 199 transitions. [2020-10-27 01:05:47,542 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 199 transitions. Word has length 34 [2020-10-27 01:05:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:47,543 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 199 transitions. [2020-10-27 01:05:47,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 199 transitions. [2020-10-27 01:05:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:05:47,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:47,544 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:47,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:05:47,544 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1602909289, now seen corresponding path program 1 times [2020-10-27 01:05:47,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:47,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322666486] [2020-10-27 01:05:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:47,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:52,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:52,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:05:52,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:05:52,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:05:52,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:52,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:52,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:52,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:52,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:52,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:52,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:52,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:52,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:52,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:52,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:52,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:52,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:52,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:05:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322666486] [2020-10-27 01:05:52,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:52,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:52,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772433599] [2020-10-27 01:05:52,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:52,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:52,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:52,724 INFO L87 Difference]: Start difference. First operand 152 states and 199 transitions. Second operand 8 states. [2020-10-27 01:05:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:53,136 INFO L93 Difference]: Finished difference Result 187 states and 241 transitions. [2020-10-27 01:05:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:53,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 01:05:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:53,139 INFO L225 Difference]: With dead ends: 187 [2020-10-27 01:05:53,139 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:05:53,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:05:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2020-10-27 01:05:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:05:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 194 transitions. [2020-10-27 01:05:53,159 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 194 transitions. Word has length 34 [2020-10-27 01:05:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:53,160 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 194 transitions. [2020-10-27 01:05:53,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 194 transitions. [2020-10-27 01:05:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:05:53,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:53,161 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:53,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:05:53,162 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:53,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1990993429, now seen corresponding path program 1 times [2020-10-27 01:05:53,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:53,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642889517] [2020-10-27 01:05:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:53,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:54,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:05:54,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:54,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-27 01:05:54,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:54,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:05:54,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:55,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:55,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:55,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:55,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:55,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:55,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:55,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:55,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:55,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:55,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:55,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642889517] [2020-10-27 01:05:55,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:55,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:55,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240866454] [2020-10-27 01:05:55,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:55,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:55,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:55,025 INFO L87 Difference]: Start difference. First operand 149 states and 194 transitions. Second operand 11 states. [2020-10-27 01:05:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:55,800 INFO L93 Difference]: Finished difference Result 203 states and 260 transitions. [2020-10-27 01:05:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:55,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 01:05:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:55,803 INFO L225 Difference]: With dead ends: 203 [2020-10-27 01:05:55,803 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 01:05:55,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:05:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 01:05:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2020-10-27 01:05:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 01:05:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2020-10-27 01:05:55,820 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 34 [2020-10-27 01:05:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:55,820 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2020-10-27 01:05:55,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2020-10-27 01:05:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:05:55,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:55,821 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:55,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:05:55,821 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:55,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1494627241, now seen corresponding path program 1 times [2020-10-27 01:05:55,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:55,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552902397] [2020-10-27 01:05:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:55,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:55,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:55,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:57,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:05:57,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:05:57,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1226 [2020-10-27 01:05:57,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:05:57,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:57,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:57,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:57,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:57,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:57,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:57,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:57,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:57,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:57,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:57,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:05:57,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552902397] [2020-10-27 01:05:57,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:57,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:57,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327380110] [2020-10-27 01:05:57,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:57,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:57,141 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand 6 states. [2020-10-27 01:05:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:57,429 INFO L93 Difference]: Finished difference Result 186 states and 239 transitions. [2020-10-27 01:05:57,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:57,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-27 01:05:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:57,431 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:05:57,431 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 01:05:57,433 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 01:05:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 01:05:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2020-10-27 01:05:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:05:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2020-10-27 01:05:57,449 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 34 [2020-10-27 01:05:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:57,450 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2020-10-27 01:05:57,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2020-10-27 01:05:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:05:57,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:57,451 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:57,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:05:57,451 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash 317988957, now seen corresponding path program 2 times [2020-10-27 01:05:57,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:57,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236888304] [2020-10-27 01:05:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:57,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:58,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:05:58,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:58,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-27 01:05:58,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:05:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:58,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:05:58,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:58,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:58,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:58,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:58,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:58,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:58,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:58,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:58,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:58,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:58,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:58,928 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 01:05:58,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236888304] [2020-10-27 01:05:58,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:58,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:58,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730686748] [2020-10-27 01:05:58,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:58,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:58,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:58,932 INFO L87 Difference]: Start difference. First operand 155 states and 199 transitions. Second operand 11 states. [2020-10-27 01:05:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:59,741 INFO L93 Difference]: Finished difference Result 263 states and 341 transitions. [2020-10-27 01:05:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:59,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:05:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:59,743 INFO L225 Difference]: With dead ends: 263 [2020-10-27 01:05:59,743 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 01:05:59,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:05:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 01:05:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 170. [2020-10-27 01:05:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-27 01:05:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 218 transitions. [2020-10-27 01:05:59,763 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 218 transitions. Word has length 35 [2020-10-27 01:05:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:59,764 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 218 transitions. [2020-10-27 01:05:59,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 218 transitions. [2020-10-27 01:05:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:05:59,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:59,765 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:59,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:05:59,767 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:59,767 INFO L82 PathProgramCache]: Analyzing trace with hash 285698622, now seen corresponding path program 1 times [2020-10-27 01:05:59,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:59,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234519364] [2020-10-27 01:05:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:00,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:00,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:06:00,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:00,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-27 01:06:00,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:06:00,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:01,286 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-27 01:06:01,492 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2020-10-27 01:06:01,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:01,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:01,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:01,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:01,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:01,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:01,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:01,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:01,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:06:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:01,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234519364] [2020-10-27 01:06:01,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:01,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:01,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546358537] [2020-10-27 01:06:01,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:01,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:01,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:01,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:01,753 INFO L87 Difference]: Start difference. First operand 170 states and 218 transitions. Second operand 11 states. [2020-10-27 01:06:02,002 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-27 01:06:02,138 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-27 01:06:02,298 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-27 01:06:02,441 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 01:06:03,544 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 01:06:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:04,178 INFO L93 Difference]: Finished difference Result 223 states and 282 transitions. [2020-10-27 01:06:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:06:04,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:06:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:04,186 INFO L225 Difference]: With dead ends: 223 [2020-10-27 01:06:04,187 INFO L226 Difference]: Without dead ends: 219 [2020-10-27 01:06:04,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:06:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-27 01:06:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 181. [2020-10-27 01:06:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 01:06:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 229 transitions. [2020-10-27 01:06:04,205 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 229 transitions. Word has length 35 [2020-10-27 01:06:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:04,205 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 229 transitions. [2020-10-27 01:06:04,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 229 transitions. [2020-10-27 01:06:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:06:04,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:04,206 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:04,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:06:04,207 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash 255949343, now seen corresponding path program 3 times [2020-10-27 01:06:04,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:04,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040998316] [2020-10-27 01:06:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:04,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:04,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:05,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:06:05,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:05,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-27 01:06:05,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:05,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:05,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:05,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:06:05,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:05,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:05,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:05,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:05,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:05,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:05,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:05,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:05,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:05,437 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 01:06:05,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040998316] [2020-10-27 01:06:05,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:05,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:05,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837487712] [2020-10-27 01:06:05,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:05,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:05,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:05,440 INFO L87 Difference]: Start difference. First operand 181 states and 229 transitions. Second operand 12 states. [2020-10-27 01:06:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:06,547 INFO L93 Difference]: Finished difference Result 243 states and 312 transitions. [2020-10-27 01:06:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:06:06,548 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-27 01:06:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:06,550 INFO L225 Difference]: With dead ends: 243 [2020-10-27 01:06:06,550 INFO L226 Difference]: Without dead ends: 239 [2020-10-27 01:06:06,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-27 01:06:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 200. [2020-10-27 01:06:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 01:06:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 255 transitions. [2020-10-27 01:06:06,569 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 255 transitions. Word has length 35 [2020-10-27 01:06:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:06,570 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 255 transitions. [2020-10-27 01:06:06,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 255 transitions. [2020-10-27 01:06:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:06:06,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:06,571 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, 1, 1] [2020-10-27 01:06:06,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:06:06,571 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash -143166156, now seen corresponding path program 1 times [2020-10-27 01:06:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:06,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180219747] [2020-10-27 01:06:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:06,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:07,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:06:07,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:07,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-27 01:06:07,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:07,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:06:07,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:07,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:06:07,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:07,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:07,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:07,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:07,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180219747] [2020-10-27 01:06:07,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:07,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:07,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181422936] [2020-10-27 01:06:07,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:07,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:07,224 INFO L87 Difference]: Start difference. First operand 200 states and 255 transitions. Second operand 8 states. [2020-10-27 01:06:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:07,671 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-10-27 01:06:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:07,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 01:06:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:07,674 INFO L225 Difference]: With dead ends: 240 [2020-10-27 01:06:07,674 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 01:06:07,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 01:06:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-27 01:06:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 01:06:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 251 transitions. [2020-10-27 01:06:07,693 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 251 transitions. Word has length 36 [2020-10-27 01:06:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:07,693 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 251 transitions. [2020-10-27 01:06:07,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 251 transitions. [2020-10-27 01:06:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:06:07,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:07,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-27 01:06:07,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:06:07,694 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:07,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2060301334, now seen corresponding path program 2 times [2020-10-27 01:06:07,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:07,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786440639] [2020-10-27 01:06:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:07,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:07,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:10,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:06:10,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:10,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3103 [2020-10-27 01:06:10,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:10,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:10,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:10,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:06:10,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:10,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:10,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:10,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:10,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:10,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:10,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:11,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786440639] [2020-10-27 01:06:11,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:11,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709443460] [2020-10-27 01:06:11,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:11,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:11,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:11,011 INFO L87 Difference]: Start difference. First operand 197 states and 251 transitions. Second operand 10 states. [2020-10-27 01:06:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:12,005 INFO L93 Difference]: Finished difference Result 256 states and 324 transitions. [2020-10-27 01:06:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:12,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 01:06:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:12,009 INFO L225 Difference]: With dead ends: 256 [2020-10-27 01:06:12,009 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 01:06:12,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 01:06:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2020-10-27 01:06:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 01:06:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 249 transitions. [2020-10-27 01:06:12,032 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 249 transitions. Word has length 37 [2020-10-27 01:06:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:12,032 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 249 transitions. [2020-10-27 01:06:12,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 249 transitions. [2020-10-27 01:06:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:12,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:12,035 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2020-10-27 01:06:12,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:06:12,035 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:12,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:12,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1224846076, now seen corresponding path program 3 times [2020-10-27 01:06:12,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:12,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441407977] [2020-10-27 01:06:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:12,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:12,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:12,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-27 01:06:12,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:12,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:06:12,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:13,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:13,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:13,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:13,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:13,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:13,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:13,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:13,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:13,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441407977] [2020-10-27 01:06:13,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:13,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:13,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307227302] [2020-10-27 01:06:13,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:13,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:13,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:13,315 INFO L87 Difference]: Start difference. First operand 196 states and 249 transitions. Second operand 12 states. [2020-10-27 01:06:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:14,395 INFO L93 Difference]: Finished difference Result 319 states and 403 transitions. [2020-10-27 01:06:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:06:14,397 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 01:06:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:14,398 INFO L225 Difference]: With dead ends: 319 [2020-10-27 01:06:14,398 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 01:06:14,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:06:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 01:06:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 223. [2020-10-27 01:06:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 01:06:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 283 transitions. [2020-10-27 01:06:14,421 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 283 transitions. Word has length 38 [2020-10-27 01:06:14,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:14,421 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 283 transitions. [2020-10-27 01:06:14,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:14,421 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 283 transitions. [2020-10-27 01:06:14,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:14,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:14,422 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:14,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:06:14,423 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 831819066, now seen corresponding path program 1 times [2020-10-27 01:06:14,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:14,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260616294] [2020-10-27 01:06:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:14,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:16,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:06:16,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2551 [2020-10-27 01:06:16,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:16,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:16,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:06:16,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:17,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:17,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:17,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:17,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:17,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:17,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:17,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:17,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:17,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:17,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:17,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260616294] [2020-10-27 01:06:17,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:17,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:17,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948577143] [2020-10-27 01:06:17,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:17,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:17,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:17,196 INFO L87 Difference]: Start difference. First operand 223 states and 283 transitions. Second operand 11 states. [2020-10-27 01:06:17,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:17,870 INFO L93 Difference]: Finished difference Result 283 states and 358 transitions. [2020-10-27 01:06:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:17,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-27 01:06:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:17,873 INFO L225 Difference]: With dead ends: 283 [2020-10-27 01:06:17,873 INFO L226 Difference]: Without dead ends: 227 [2020-10-27 01:06:17,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-27 01:06:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 222. [2020-10-27 01:06:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 01:06:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 279 transitions. [2020-10-27 01:06:17,893 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 279 transitions. Word has length 38 [2020-10-27 01:06:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:17,894 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 279 transitions. [2020-10-27 01:06:17,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 279 transitions. [2020-10-27 01:06:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:17,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:17,895 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2020-10-27 01:06:17,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:06:17,895 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1084297466, now seen corresponding path program 4 times [2020-10-27 01:06:17,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:17,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434211392] [2020-10-27 01:06:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:17,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:18,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:18,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:18,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-27 01:06:18,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:18,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:06:18,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:19,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:19,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:19,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:19,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:19,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:19,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:19,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434211392] [2020-10-27 01:06:19,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:19,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:19,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699378733] [2020-10-27 01:06:19,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:19,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:19,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:19,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:19,021 INFO L87 Difference]: Start difference. First operand 222 states and 279 transitions. Second operand 13 states. [2020-10-27 01:06:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:20,596 INFO L93 Difference]: Finished difference Result 298 states and 373 transitions. [2020-10-27 01:06:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:06:20,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 01:06:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:20,601 INFO L225 Difference]: With dead ends: 298 [2020-10-27 01:06:20,601 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 01:06:20,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:06:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 01:06:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 236. [2020-10-27 01:06:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-27 01:06:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 297 transitions. [2020-10-27 01:06:20,625 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 297 transitions. Word has length 38 [2020-10-27 01:06:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:20,626 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 297 transitions. [2020-10-27 01:06:20,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:20,626 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 297 transitions. [2020-10-27 01:06:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:06:20,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:20,627 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, 1, 1, 1, 1, 1] [2020-10-27 01:06:20,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:06:20,627 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1231516458, now seen corresponding path program 1 times [2020-10-27 01:06:20,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:20,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091032637] [2020-10-27 01:06:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:21,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:06:21,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 01:06:21,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:06:21,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:21,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:21,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:21,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:21,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:21,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:21,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:21,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:21,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:21,226 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 01:06:21,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091032637] [2020-10-27 01:06:21,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:21,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:21,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764474758] [2020-10-27 01:06:21,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:21,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:21,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:21,231 INFO L87 Difference]: Start difference. First operand 236 states and 297 transitions. Second operand 9 states. [2020-10-27 01:06:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:21,796 INFO L93 Difference]: Finished difference Result 266 states and 333 transitions. [2020-10-27 01:06:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:06:21,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-27 01:06:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:21,798 INFO L225 Difference]: With dead ends: 266 [2020-10-27 01:06:21,798 INFO L226 Difference]: Without dead ends: 239 [2020-10-27 01:06:21,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:21,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-27 01:06:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2020-10-27 01:06:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 01:06:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 300 transitions. [2020-10-27 01:06:21,826 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 300 transitions. Word has length 39 [2020-10-27 01:06:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:21,826 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 300 transitions. [2020-10-27 01:06:21,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:21,827 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 300 transitions. [2020-10-27 01:06:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:06:21,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:21,828 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:21,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:06:21,828 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:21,829 INFO L82 PathProgramCache]: Analyzing trace with hash -652309006, now seen corresponding path program 4 times [2020-10-27 01:06:21,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:21,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619009751] [2020-10-27 01:06:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:21,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:06:23,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:23,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:23,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:23,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:23,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:06:23,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:23,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619009751] [2020-10-27 01:06:23,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:23,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:23,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646085176] [2020-10-27 01:06:23,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:23,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:23,508 INFO L87 Difference]: Start difference. First operand 239 states and 300 transitions. Second operand 13 states. [2020-10-27 01:06:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:24,649 INFO L93 Difference]: Finished difference Result 278 states and 349 transitions. [2020-10-27 01:06:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:24,649 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 01:06:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:24,652 INFO L225 Difference]: With dead ends: 278 [2020-10-27 01:06:24,652 INFO L226 Difference]: Without dead ends: 274 [2020-10-27 01:06:24,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:06:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-27 01:06:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 234. [2020-10-27 01:06:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 01:06:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 292 transitions. [2020-10-27 01:06:24,677 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 292 transitions. Word has length 39 [2020-10-27 01:06:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:24,677 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 292 transitions. [2020-10-27 01:06:24,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 292 transitions. [2020-10-27 01:06:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:06:24,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:24,678 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:24,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:06:24,679 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -684599341, now seen corresponding path program 2 times [2020-10-27 01:06:24,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:24,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663256570] [2020-10-27 01:06:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:24,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1803 [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:06:26,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:26,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:26,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:26,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:26,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:26,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:26,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:26,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:26,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:26,958 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 01:06:26,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663256570] [2020-10-27 01:06:26,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:26,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:26,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575525246] [2020-10-27 01:06:26,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:26,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:26,960 INFO L87 Difference]: Start difference. First operand 234 states and 292 transitions. Second operand 12 states. [2020-10-27 01:06:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:27,992 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2020-10-27 01:06:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:06:27,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 01:06:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:27,993 INFO L225 Difference]: With dead ends: 288 [2020-10-27 01:06:27,994 INFO L226 Difference]: Without dead ends: 284 [2020-10-27 01:06:27,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-27 01:06:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2020-10-27 01:06:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 01:06:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 285 transitions. [2020-10-27 01:06:28,016 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 285 transitions. Word has length 39 [2020-10-27 01:06:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:28,016 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 285 transitions. [2020-10-27 01:06:28,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 285 transitions. [2020-10-27 01:06:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:06:28,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:28,017 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:28,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:06:28,017 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:28,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2143124991, now seen corresponding path program 1 times [2020-10-27 01:06:28,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:28,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145496579] [2020-10-27 01:06:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:28,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:28,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:29,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:29,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:06:29,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:29,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1476 [2020-10-27 01:06:29,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:29,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:29,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:29,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:06:29,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:30,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:30,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:30,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145496579] [2020-10-27 01:06:30,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:30,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:30,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151019089] [2020-10-27 01:06:30,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:30,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:30,179 INFO L87 Difference]: Start difference. First operand 227 states and 285 transitions. Second operand 13 states. [2020-10-27 01:06:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:31,809 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2020-10-27 01:06:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:06:31,810 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 01:06:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:31,811 INFO L225 Difference]: With dead ends: 281 [2020-10-27 01:06:31,811 INFO L226 Difference]: Without dead ends: 277 [2020-10-27 01:06:31,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-27 01:06:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 227. [2020-10-27 01:06:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 01:06:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 285 transitions. [2020-10-27 01:06:31,836 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 285 transitions. Word has length 40 [2020-10-27 01:06:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:31,837 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 285 transitions. [2020-10-27 01:06:31,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 285 transitions. [2020-10-27 01:06:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:06:31,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:31,838 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:31,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:06:31,838 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash 483964986, now seen corresponding path program 1 times [2020-10-27 01:06:31,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:31,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104635032] [2020-10-27 01:06:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:31,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:32,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:32,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:06:32,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:32,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-27 01:06:32,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:32,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:32,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:32,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:06:32,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:32,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:32,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:32,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:32,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:32,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:32,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:32,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:32,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:32,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:32,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104635032] [2020-10-27 01:06:32,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:32,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:32,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492230706] [2020-10-27 01:06:32,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:32,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:32,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:32,601 INFO L87 Difference]: Start difference. First operand 227 states and 285 transitions. Second operand 11 states. [2020-10-27 01:06:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:33,773 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2020-10-27 01:06:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:33,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-27 01:06:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:33,776 INFO L225 Difference]: With dead ends: 286 [2020-10-27 01:06:33,776 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 01:06:33,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:06:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 01:06:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2020-10-27 01:06:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-27 01:06:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 303 transitions. [2020-10-27 01:06:33,803 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 303 transitions. Word has length 40 [2020-10-27 01:06:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:33,804 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 303 transitions. [2020-10-27 01:06:33,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 303 transitions. [2020-10-27 01:06:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:06:33,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:33,805 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, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:33,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:06:33,805 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:33,806 INFO L82 PathProgramCache]: Analyzing trace with hash -698566340, now seen corresponding path program 1 times [2020-10-27 01:06:33,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:33,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102624604] [2020-10-27 01:06:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:33,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:34,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:34,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:06:34,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-27 01:06:34,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:34,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:34,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:06:34,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:34,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:34,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:34,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:34,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:34,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:34,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:34,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:34,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:34,904 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 01:06:34,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102624604] [2020-10-27 01:06:34,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:34,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:34,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304066498] [2020-10-27 01:06:34,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:34,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:34,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:34,906 INFO L87 Difference]: Start difference. First operand 241 states and 303 transitions. Second operand 12 states. [2020-10-27 01:06:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:35,933 INFO L93 Difference]: Finished difference Result 306 states and 383 transitions. [2020-10-27 01:06:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:35,938 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 01:06:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:35,940 INFO L225 Difference]: With dead ends: 306 [2020-10-27 01:06:35,940 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 01:06:35,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:06:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 01:06:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 245. [2020-10-27 01:06:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 01:06:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 307 transitions. [2020-10-27 01:06:35,969 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 307 transitions. Word has length 40 [2020-10-27 01:06:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:35,969 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 307 transitions. [2020-10-27 01:06:35,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 307 transitions. [2020-10-27 01:06:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:06:35,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:35,971 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:35,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:06:35,971 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2060986365, now seen corresponding path program 5 times [2020-10-27 01:06:35,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:35,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830692271] [2020-10-27 01:06:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:35,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:36,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:37,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:37,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:06:37,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:37,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-27 01:06:37,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:37,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:06:37,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:37,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:06:37,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:37,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:37,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:37,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:37,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:37,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:37,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:37,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:37,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:37,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:37,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:37,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830692271] [2020-10-27 01:06:37,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:37,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:37,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479023251] [2020-10-27 01:06:37,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:37,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:37,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:37,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:37,608 INFO L87 Difference]: Start difference. First operand 245 states and 307 transitions. Second operand 13 states. [2020-10-27 01:06:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:39,656 INFO L93 Difference]: Finished difference Result 317 states and 398 transitions. [2020-10-27 01:06:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:06:39,657 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 01:06:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:39,659 INFO L225 Difference]: With dead ends: 317 [2020-10-27 01:06:39,660 INFO L226 Difference]: Without dead ends: 313 [2020-10-27 01:06:39,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:06:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-27 01:06:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 266. [2020-10-27 01:06:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-27 01:06:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 337 transitions. [2020-10-27 01:06:39,698 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 337 transitions. Word has length 41 [2020-10-27 01:06:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:39,698 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 337 transitions. [2020-10-27 01:06:39,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 337 transitions. [2020-10-27 01:06:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:06:39,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:39,699 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:39,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:06:39,700 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:39,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1807404787, now seen corresponding path program 1 times [2020-10-27 01:06:39,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:39,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497312675] [2020-10-27 01:06:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:39,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:42,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:42,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:06:42,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:42,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2367 [2020-10-27 01:06:42,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:42,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:42,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:42,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:06:42,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:42,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:42,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:42,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:42,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:42,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:42,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:42,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:42,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:42,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497312675] [2020-10-27 01:06:42,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:42,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:42,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583173759] [2020-10-27 01:06:42,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:42,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:42,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:42,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:42,732 INFO L87 Difference]: Start difference. First operand 266 states and 337 transitions. Second operand 13 states. [2020-10-27 01:06:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:44,437 INFO L93 Difference]: Finished difference Result 313 states and 392 transitions. [2020-10-27 01:06:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:06:44,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 01:06:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:44,440 INFO L225 Difference]: With dead ends: 313 [2020-10-27 01:06:44,440 INFO L226 Difference]: Without dead ends: 301 [2020-10-27 01:06:44,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-27 01:06:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 262. [2020-10-27 01:06:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 01:06:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 332 transitions. [2020-10-27 01:06:44,469 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 332 transitions. Word has length 41 [2020-10-27 01:06:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:44,469 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 332 transitions. [2020-10-27 01:06:44,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 332 transitions. [2020-10-27 01:06:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:06:44,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:44,471 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:44,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:06:44,471 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1696232717, now seen corresponding path program 1 times [2020-10-27 01:06:44,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:44,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336426409] [2020-10-27 01:06:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:45,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:06:45,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:45,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-27 01:06:45,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:45,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:45,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:45,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:06:45,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:45,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:45,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:45,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,418 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 01:06:45,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336426409] [2020-10-27 01:06:45,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:45,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:45,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484565456] [2020-10-27 01:06:45,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:45,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:45,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:45,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:45,420 INFO L87 Difference]: Start difference. First operand 262 states and 332 transitions. Second operand 12 states. [2020-10-27 01:06:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:46,433 INFO L93 Difference]: Finished difference Result 320 states and 402 transitions. [2020-10-27 01:06:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:46,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-27 01:06:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:46,435 INFO L225 Difference]: With dead ends: 320 [2020-10-27 01:06:46,435 INFO L226 Difference]: Without dead ends: 316 [2020-10-27 01:06:46,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:06:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-27 01:06:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 262. [2020-10-27 01:06:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 01:06:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 332 transitions. [2020-10-27 01:06:46,461 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 332 transitions. Word has length 41 [2020-10-27 01:06:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:46,462 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 332 transitions. [2020-10-27 01:06:46,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 332 transitions. [2020-10-27 01:06:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:06:46,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:46,463 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:46,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:06:46,463 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:46,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1384077270, now seen corresponding path program 1 times [2020-10-27 01:06:46,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:46,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120965581] [2020-10-27 01:06:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:46,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:06:46,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:46,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 01:06:46,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:06:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:06:46,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:06:46,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:46,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:46,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:46,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:46,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:46,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:46,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:46,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:06:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120965581] [2020-10-27 01:06:46,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:46,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:06:46,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476811193] [2020-10-27 01:06:46,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:06:46,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:46,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:06:46,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:46,634 INFO L87 Difference]: Start difference. First operand 262 states and 332 transitions. Second operand 4 states. [2020-10-27 01:06:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:46,821 INFO L93 Difference]: Finished difference Result 432 states and 545 transitions. [2020-10-27 01:06:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:06:46,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 01:06:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:46,823 INFO L225 Difference]: With dead ends: 432 [2020-10-27 01:06:46,824 INFO L226 Difference]: Without dead ends: 235 [2020-10-27 01:06:46,825 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 01:06:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-27 01:06:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2020-10-27 01:06:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 01:06:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 286 transitions. [2020-10-27 01:06:46,847 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 286 transitions. Word has length 41 [2020-10-27 01:06:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:46,847 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 286 transitions. [2020-10-27 01:06:46,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:06:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 286 transitions. [2020-10-27 01:06:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:06:46,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:46,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:46,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:06:46,849 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1819325621, now seen corresponding path program 1 times [2020-10-27 01:06:46,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:46,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578212816] [2020-10-27 01:06:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:46,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:06:47,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:47,718 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2020-10-27 01:06:47,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:47,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:47,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:47,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:47,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:47,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:47,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:47,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:47,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:47,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:47,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578212816] [2020-10-27 01:06:47,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:47,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:47,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254115308] [2020-10-27 01:06:47,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:47,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:47,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:47,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:47,887 INFO L87 Difference]: Start difference. First operand 234 states and 286 transitions. Second operand 12 states. [2020-10-27 01:06:48,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:48,526 INFO L93 Difference]: Finished difference Result 293 states and 356 transitions. [2020-10-27 01:06:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:48,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 01:06:48,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:48,527 INFO L225 Difference]: With dead ends: 293 [2020-10-27 01:06:48,528 INFO L226 Difference]: Without dead ends: 269 [2020-10-27 01:06:48,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:06:48,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-27 01:06:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 249. [2020-10-27 01:06:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-27 01:06:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 302 transitions. [2020-10-27 01:06:48,558 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 302 transitions. Word has length 42 [2020-10-27 01:06:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:48,558 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 302 transitions. [2020-10-27 01:06:48,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 302 transitions. [2020-10-27 01:06:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:06:48,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:48,560 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:48,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:06:48,560 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2144312884, now seen corresponding path program 1 times [2020-10-27 01:06:48,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:48,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183823467] [2020-10-27 01:06:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:48,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:51,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:51,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:06:51,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:51,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2466 [2020-10-27 01:06:51,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:51,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:51,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:51,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:06:51,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:51,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:51,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:51,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:51,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:51,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:51,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:06:51,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:51,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:51,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183823467] [2020-10-27 01:06:51,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:51,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:06:51,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759455240] [2020-10-27 01:06:51,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:06:51,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:51,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:06:51,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:51,545 INFO L87 Difference]: Start difference. First operand 249 states and 302 transitions. Second operand 13 states. [2020-10-27 01:06:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:53,375 INFO L93 Difference]: Finished difference Result 309 states and 374 transitions. [2020-10-27 01:06:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:06:53,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 01:06:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:53,377 INFO L225 Difference]: With dead ends: 309 [2020-10-27 01:06:53,377 INFO L226 Difference]: Without dead ends: 305 [2020-10-27 01:06:53,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:06:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-27 01:06:53,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 243. [2020-10-27 01:06:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-27 01:06:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 296 transitions. [2020-10-27 01:06:53,404 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 296 transitions. Word has length 42 [2020-10-27 01:06:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:53,404 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 296 transitions. [2020-10-27 01:06:53,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:06:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 296 transitions. [2020-10-27 01:06:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:06:53,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:53,405 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:53,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:06:53,405 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:53,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1318619581, now seen corresponding path program 3 times [2020-10-27 01:06:53,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:53,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682529865] [2020-10-27 01:06:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:53,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:54,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:54,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:06:54,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:54,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1433 [2020-10-27 01:06:54,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:54,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:06:54,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:54,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:06:54,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:55,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:55,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:55,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:55,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:55,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:55,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:55,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:55,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:55,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682529865] [2020-10-27 01:06:55,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:55,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:55,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384880951] [2020-10-27 01:06:55,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:55,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:55,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:55,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:55,445 INFO L87 Difference]: Start difference. First operand 243 states and 296 transitions. Second operand 12 states. [2020-10-27 01:06:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:56,335 INFO L93 Difference]: Finished difference Result 373 states and 461 transitions. [2020-10-27 01:06:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:56,335 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 01:06:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:56,337 INFO L225 Difference]: With dead ends: 373 [2020-10-27 01:06:56,337 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 01:06:56,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:06:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 01:06:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 243. [2020-10-27 01:06:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-27 01:06:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 293 transitions. [2020-10-27 01:06:56,368 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 293 transitions. Word has length 42 [2020-10-27 01:06:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:56,368 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 293 transitions. [2020-10-27 01:06:56,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 293 transitions. [2020-10-27 01:06:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:06:56,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:56,369 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:56,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:06:56,370 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash 659977859, now seen corresponding path program 1 times [2020-10-27 01:06:56,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:56,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016976994] [2020-10-27 01:06:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:57,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:06:57,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:57,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-27 01:06:57,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:57,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:06:57,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:57,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:06:57,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:58,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:58,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:58,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:58,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:58,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:58,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:58,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:58,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:58,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016976994] [2020-10-27 01:06:58,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:58,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:06:58,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815851774] [2020-10-27 01:06:58,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:06:58,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:58,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:06:58,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:06:58,496 INFO L87 Difference]: Start difference. First operand 243 states and 293 transitions. Second operand 14 states. [2020-10-27 01:07:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:00,402 INFO L93 Difference]: Finished difference Result 334 states and 407 transitions. [2020-10-27 01:07:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:07:00,403 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-27 01:07:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:00,405 INFO L225 Difference]: With dead ends: 334 [2020-10-27 01:07:00,405 INFO L226 Difference]: Without dead ends: 330 [2020-10-27 01:07:00,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-27 01:07:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 277. [2020-10-27 01:07:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 01:07:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 336 transitions. [2020-10-27 01:07:00,440 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 336 transitions. Word has length 42 [2020-10-27 01:07:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:00,440 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 336 transitions. [2020-10-27 01:07:00,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 336 transitions. [2020-10-27 01:07:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:07:00,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:00,441 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:00,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:07:00,441 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2068813507, now seen corresponding path program 2 times [2020-10-27 01:07:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:00,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294362413] [2020-10-27 01:07:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:00,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:01,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:07:01,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:01,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-27 01:07:01,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:01,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:01,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:01,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:07:01,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:01,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:01,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:01,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:01,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:01,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:01,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:01,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:01,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:01,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:01,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:01,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294362413] [2020-10-27 01:07:01,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:01,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:01,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543271383] [2020-10-27 01:07:01,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:01,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:01,985 INFO L87 Difference]: Start difference. First operand 277 states and 336 transitions. Second operand 13 states. [2020-10-27 01:07:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:03,195 INFO L93 Difference]: Finished difference Result 377 states and 460 transitions. [2020-10-27 01:07:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:03,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 01:07:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:03,198 INFO L225 Difference]: With dead ends: 377 [2020-10-27 01:07:03,199 INFO L226 Difference]: Without dead ends: 326 [2020-10-27 01:07:03,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-27 01:07:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2020-10-27 01:07:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-27 01:07:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 352 transitions. [2020-10-27 01:07:03,238 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 352 transitions. Word has length 42 [2020-10-27 01:07:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:03,238 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 352 transitions. [2020-10-27 01:07:03,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 352 transitions. [2020-10-27 01:07:03,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:07:03,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:03,240 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:03,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:07:03,240 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:03,241 INFO L82 PathProgramCache]: Analyzing trace with hash 89322175, now seen corresponding path program 1 times [2020-10-27 01:07:03,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:03,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334871170] [2020-10-27 01:07:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:03,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:03,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:04,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:04,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:07:04,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:04,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-27 01:07:04,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:04,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:07:04,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:04,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:04,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:04,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:04,442 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 01:07:04,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334871170] [2020-10-27 01:07:04,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:04,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:04,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557183209] [2020-10-27 01:07:04,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:04,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:04,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:04,443 INFO L87 Difference]: Start difference. First operand 291 states and 352 transitions. Second operand 12 states. [2020-10-27 01:07:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:05,121 INFO L93 Difference]: Finished difference Result 313 states and 377 transitions. [2020-10-27 01:07:05,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:05,125 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-27 01:07:05,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:05,127 INFO L225 Difference]: With dead ends: 313 [2020-10-27 01:07:05,127 INFO L226 Difference]: Without dead ends: 309 [2020-10-27 01:07:05,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:07:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-27 01:07:05,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 295. [2020-10-27 01:07:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-27 01:07:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 356 transitions. [2020-10-27 01:07:05,159 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 356 transitions. Word has length 43 [2020-10-27 01:07:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:05,159 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 356 transitions. [2020-10-27 01:07:05,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 356 transitions. [2020-10-27 01:07:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:07:05,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:05,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:05,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:07:05,161 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash -389947496, now seen corresponding path program 3 times [2020-10-27 01:07:05,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:05,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893913659] [2020-10-27 01:07:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:10,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:10,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:07:10,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:07:10,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 01:07:10,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:07:10,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:10,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:10,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:10,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:10,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:10,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:10,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:10,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:10,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:10,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:10,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:10,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893913659] [2020-10-27 01:07:10,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:10,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:10,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257411090] [2020-10-27 01:07:10,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:10,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:10,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:10,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:10,713 INFO L87 Difference]: Start difference. First operand 295 states and 356 transitions. Second operand 12 states. [2020-10-27 01:07:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:11,927 INFO L93 Difference]: Finished difference Result 369 states and 444 transitions. [2020-10-27 01:07:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:11,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-27 01:07:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:11,930 INFO L225 Difference]: With dead ends: 369 [2020-10-27 01:07:11,931 INFO L226 Difference]: Without dead ends: 328 [2020-10-27 01:07:11,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:07:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-27 01:07:11,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 294. [2020-10-27 01:07:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-27 01:07:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 354 transitions. [2020-10-27 01:07:11,959 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 354 transitions. Word has length 44 [2020-10-27 01:07:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:11,959 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 354 transitions. [2020-10-27 01:07:11,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 354 transitions. [2020-10-27 01:07:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:07:11,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:11,961 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:11,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:07:11,961 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:11,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:11,961 INFO L82 PathProgramCache]: Analyzing trace with hash 12073588, now seen corresponding path program 1 times [2020-10-27 01:07:11,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:11,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830373550] [2020-10-27 01:07:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:11,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:12,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:12,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:13,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:13,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:07:13,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-10-27 01:07:13,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:07:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:13,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:13,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:13,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:13,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:13,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:13,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:13,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:13,789 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 01:07:13,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830373550] [2020-10-27 01:07:13,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:13,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:13,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386905137] [2020-10-27 01:07:13,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:13,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:13,791 INFO L87 Difference]: Start difference. First operand 294 states and 354 transitions. Second operand 12 states. [2020-10-27 01:07:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:14,782 INFO L93 Difference]: Finished difference Result 312 states and 374 transitions. [2020-10-27 01:07:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:14,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 01:07:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:14,785 INFO L225 Difference]: With dead ends: 312 [2020-10-27 01:07:14,785 INFO L226 Difference]: Without dead ends: 308 [2020-10-27 01:07:14,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-27 01:07:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 296. [2020-10-27 01:07:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-27 01:07:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 356 transitions. [2020-10-27 01:07:14,812 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 356 transitions. Word has length 45 [2020-10-27 01:07:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:14,813 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 356 transitions. [2020-10-27 01:07:14,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 356 transitions. [2020-10-27 01:07:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:07:14,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:14,814 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:14,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:07:14,814 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:14,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1753799446, now seen corresponding path program 4 times [2020-10-27 01:07:14,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:14,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692798059] [2020-10-27 01:07:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:14,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:16,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:16,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:07:16,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:16,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1931 [2020-10-27 01:07:16,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:07:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:07:16,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:17,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:17,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:17,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:17,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692798059] [2020-10-27 01:07:17,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:17,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:17,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888249108] [2020-10-27 01:07:17,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:17,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:17,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:17,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:17,226 INFO L87 Difference]: Start difference. First operand 296 states and 356 transitions. Second operand 15 states. [2020-10-27 01:07:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:19,537 INFO L93 Difference]: Finished difference Result 375 states and 450 transitions. [2020-10-27 01:07:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:07:19,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 01:07:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:19,541 INFO L225 Difference]: With dead ends: 375 [2020-10-27 01:07:19,541 INFO L226 Difference]: Without dead ends: 371 [2020-10-27 01:07:19,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:07:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-27 01:07:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 297. [2020-10-27 01:07:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-27 01:07:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 357 transitions. [2020-10-27 01:07:19,574 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 357 transitions. Word has length 45 [2020-10-27 01:07:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:19,574 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 357 transitions. [2020-10-27 01:07:19,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 357 transitions. [2020-10-27 01:07:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:07:19,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:19,576 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:19,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:07:19,576 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:19,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1462064490, now seen corresponding path program 5 times [2020-10-27 01:07:19,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:19,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589326461] [2020-10-27 01:07:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:19,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:21,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:21,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:07:21,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:21,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1448 [2020-10-27 01:07:21,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:21,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:21,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:21,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:07:21,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:21,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:21,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:21,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:21,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:21,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:21,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:21,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:21,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589326461] [2020-10-27 01:07:21,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:21,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:21,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591170011] [2020-10-27 01:07:21,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:21,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:21,616 INFO L87 Difference]: Start difference. First operand 297 states and 357 transitions. Second operand 14 states. [2020-10-27 01:07:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:22,878 INFO L93 Difference]: Finished difference Result 399 states and 481 transitions. [2020-10-27 01:07:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:22,878 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 01:07:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:22,881 INFO L225 Difference]: With dead ends: 399 [2020-10-27 01:07:22,881 INFO L226 Difference]: Without dead ends: 362 [2020-10-27 01:07:22,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-27 01:07:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 316. [2020-10-27 01:07:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-27 01:07:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 379 transitions. [2020-10-27 01:07:22,911 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 379 transitions. Word has length 45 [2020-10-27 01:07:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:22,911 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 379 transitions. [2020-10-27 01:07:22,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 379 transitions. [2020-10-27 01:07:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:07:22,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:22,912 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:22,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:07:22,913 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:22,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1855091500, now seen corresponding path program 1 times [2020-10-27 01:07:22,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:22,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743519476] [2020-10-27 01:07:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:22,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:23,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:23,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:24,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:26,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:26,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:07:26,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:07:26,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3984 [2020-10-27 01:07:26,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:26,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:26,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:26,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:07:26,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:27,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:27,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:27,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:27,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:27,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:27,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:27,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743519476] [2020-10-27 01:07:27,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:27,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:27,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955688907] [2020-10-27 01:07:27,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:27,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:27,231 INFO L87 Difference]: Start difference. First operand 316 states and 379 transitions. Second operand 13 states. [2020-10-27 01:07:28,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:28,482 INFO L93 Difference]: Finished difference Result 389 states and 468 transitions. [2020-10-27 01:07:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:28,483 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 01:07:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:28,485 INFO L225 Difference]: With dead ends: 389 [2020-10-27 01:07:28,486 INFO L226 Difference]: Without dead ends: 345 [2020-10-27 01:07:28,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:07:28,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-27 01:07:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 319. [2020-10-27 01:07:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-27 01:07:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 379 transitions. [2020-10-27 01:07:28,517 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 379 transitions. Word has length 45 [2020-10-27 01:07:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:28,517 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 379 transitions. [2020-10-27 01:07:28,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 379 transitions. [2020-10-27 01:07:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:07:28,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:28,518 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:28,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:07:28,519 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1724856960, now seen corresponding path program 2 times [2020-10-27 01:07:28,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:28,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234268069] [2020-10-27 01:07:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:28,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:29,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:29,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:07:29,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:29,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-27 01:07:29,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:07:29,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:29,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:29,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:29,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:29,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:29,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:29,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:07:29,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:29,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:29,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:29,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:29,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:29,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234268069] [2020-10-27 01:07:29,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:29,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:29,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581890294] [2020-10-27 01:07:29,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:29,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:29,842 INFO L87 Difference]: Start difference. First operand 319 states and 379 transitions. Second operand 13 states. [2020-10-27 01:07:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:30,895 INFO L93 Difference]: Finished difference Result 375 states and 446 transitions. [2020-10-27 01:07:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:30,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-27 01:07:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:30,897 INFO L225 Difference]: With dead ends: 375 [2020-10-27 01:07:30,898 INFO L226 Difference]: Without dead ends: 351 [2020-10-27 01:07:30,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-27 01:07:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 331. [2020-10-27 01:07:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-27 01:07:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 392 transitions. [2020-10-27 01:07:30,932 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 392 transitions. Word has length 46 [2020-10-27 01:07:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:30,932 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 392 transitions. [2020-10-27 01:07:30,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 392 transitions. [2020-10-27 01:07:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:07:30,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:30,933 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:30,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:07:30,933 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1593562062, now seen corresponding path program 1 times [2020-10-27 01:07:30,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:30,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092577909] [2020-10-27 01:07:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:31,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:31,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:31,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:07:31,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-27 01:07:31,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:07:31,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:32,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:32,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092577909] [2020-10-27 01:07:32,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:32,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654892873] [2020-10-27 01:07:32,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:32,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:32,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:32,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:32,049 INFO L87 Difference]: Start difference. First operand 331 states and 392 transitions. Second operand 14 states. [2020-10-27 01:07:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:33,760 INFO L93 Difference]: Finished difference Result 393 states and 466 transitions. [2020-10-27 01:07:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:33,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-27 01:07:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:33,763 INFO L225 Difference]: With dead ends: 393 [2020-10-27 01:07:33,763 INFO L226 Difference]: Without dead ends: 389 [2020-10-27 01:07:33,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-27 01:07:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 340. [2020-10-27 01:07:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-27 01:07:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 403 transitions. [2020-10-27 01:07:33,803 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 403 transitions. Word has length 46 [2020-10-27 01:07:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:33,803 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 403 transitions. [2020-10-27 01:07:33,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 403 transitions. [2020-10-27 01:07:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:07:33,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:33,804 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:33,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:07:33,805 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1200535052, now seen corresponding path program 1 times [2020-10-27 01:07:33,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:33,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933962756] [2020-10-27 01:07:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:34,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:07:34,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:34,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-27 01:07:34,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:07:34,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:35,258 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2020-10-27 01:07:35,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:35,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:35,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:35,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:35,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:35,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:35,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:35,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:35,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:35,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:35,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:35,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933962756] [2020-10-27 01:07:35,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:35,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:35,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388868212] [2020-10-27 01:07:35,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:35,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:35,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:35,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:35,316 INFO L87 Difference]: Start difference. First operand 340 states and 403 transitions. Second operand 11 states. [2020-10-27 01:07:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:36,618 INFO L93 Difference]: Finished difference Result 371 states and 439 transitions. [2020-10-27 01:07:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:07:36,618 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-27 01:07:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:36,620 INFO L225 Difference]: With dead ends: 371 [2020-10-27 01:07:36,621 INFO L226 Difference]: Without dead ends: 344 [2020-10-27 01:07:36,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-27 01:07:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 340. [2020-10-27 01:07:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-27 01:07:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 402 transitions. [2020-10-27 01:07:36,654 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 402 transitions. Word has length 46 [2020-10-27 01:07:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:36,654 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 402 transitions. [2020-10-27 01:07:36,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 402 transitions. [2020-10-27 01:07:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:07:36,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:36,656 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 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] [2020-10-27 01:07:36,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:07:36,656 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:36,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:36,656 INFO L82 PathProgramCache]: Analyzing trace with hash -937662642, now seen corresponding path program 6 times [2020-10-27 01:07:36,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:36,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520870227] [2020-10-27 01:07:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:36,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:38,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:38,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:07:38,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-27 01:07:38,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:38,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:07:38,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:38,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:07:38,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:39,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:39,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:39,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:39,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520870227] [2020-10-27 01:07:39,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:39,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:07:39,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758782367] [2020-10-27 01:07:39,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:07:39,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:39,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:07:39,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:39,433 INFO L87 Difference]: Start difference. First operand 340 states and 402 transitions. Second operand 15 states. [2020-10-27 01:07:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:41,178 INFO L93 Difference]: Finished difference Result 379 states and 452 transitions. [2020-10-27 01:07:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:41,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-27 01:07:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:41,181 INFO L225 Difference]: With dead ends: 379 [2020-10-27 01:07:41,181 INFO L226 Difference]: Without dead ends: 375 [2020-10-27 01:07:41,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-27 01:07:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 340. [2020-10-27 01:07:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-27 01:07:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 402 transitions. [2020-10-27 01:07:41,223 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 402 transitions. Word has length 46 [2020-10-27 01:07:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:41,223 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 402 transitions. [2020-10-27 01:07:41,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:07:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 402 transitions. [2020-10-27 01:07:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:07:41,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:41,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:41,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:07:41,225 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1888811860, now seen corresponding path program 2 times [2020-10-27 01:07:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:41,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686155092] [2020-10-27 01:07:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:43,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:43,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:07:43,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:43,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-27 01:07:43,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:43,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:07:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:43,540 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-27 01:07:43,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:43,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:43,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:43,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686155092] [2020-10-27 01:07:43,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:43,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:43,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56763204] [2020-10-27 01:07:43,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:43,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:43,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:43,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:43,697 INFO L87 Difference]: Start difference. First operand 340 states and 402 transitions. Second operand 14 states. [2020-10-27 01:07:44,019 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-10-27 01:07:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:44,998 INFO L93 Difference]: Finished difference Result 362 states and 427 transitions. [2020-10-27 01:07:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:07:44,998 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 01:07:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:45,001 INFO L225 Difference]: With dead ends: 362 [2020-10-27 01:07:45,001 INFO L226 Difference]: Without dead ends: 358 [2020-10-27 01:07:45,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:07:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-27 01:07:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 344. [2020-10-27 01:07:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-27 01:07:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 406 transitions. [2020-10-27 01:07:45,050 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 406 transitions. Word has length 47 [2020-10-27 01:07:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:45,051 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 406 transitions. [2020-10-27 01:07:45,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 406 transitions. [2020-10-27 01:07:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:07:45,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:45,052 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:45,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:07:45,052 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:45,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1680586438, now seen corresponding path program 1 times [2020-10-27 01:07:45,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:45,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484506137] [2020-10-27 01:07:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:45,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:45,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:46,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:46,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:07:46,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:46,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-27 01:07:46,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:46,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:07:46,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:46,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:07:46,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:46,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:46,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:46,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:46,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:46,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:46,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:46,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:46,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:46,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:46,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:46,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:46,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484506137] [2020-10-27 01:07:46,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:46,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:46,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492052741] [2020-10-27 01:07:46,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:46,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:46,890 INFO L87 Difference]: Start difference. First operand 344 states and 406 transitions. Second operand 14 states. [2020-10-27 01:07:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:48,444 INFO L93 Difference]: Finished difference Result 395 states and 466 transitions. [2020-10-27 01:07:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:48,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 01:07:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:48,447 INFO L225 Difference]: With dead ends: 395 [2020-10-27 01:07:48,447 INFO L226 Difference]: Without dead ends: 383 [2020-10-27 01:07:48,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-27 01:07:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 344. [2020-10-27 01:07:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-27 01:07:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 405 transitions. [2020-10-27 01:07:48,491 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 405 transitions. Word has length 47 [2020-10-27 01:07:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:48,491 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 405 transitions. [2020-10-27 01:07:48,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 405 transitions. [2020-10-27 01:07:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:07:48,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:48,492 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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 01:07:48,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:07:48,493 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1730001579, now seen corresponding path program 1 times [2020-10-27 01:07:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:48,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187140747] [2020-10-27 01:07:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:48,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:53,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:53,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:07:53,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:07:53,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:07:53,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:07:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:07:53,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:54,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:54,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:54,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:54,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:54,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:54,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:54,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:54,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:54,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:54,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 01:07:54,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187140747] [2020-10-27 01:07:54,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:54,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:07:54,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717529729] [2020-10-27 01:07:54,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:07:54,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:07:54,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:07:54,181 INFO L87 Difference]: Start difference. First operand 344 states and 405 transitions. Second operand 14 states. [2020-10-27 01:07:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:55,615 INFO L93 Difference]: Finished difference Result 418 states and 501 transitions. [2020-10-27 01:07:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:07:55,616 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 01:07:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:55,619 INFO L225 Difference]: With dead ends: 418 [2020-10-27 01:07:55,619 INFO L226 Difference]: Without dead ends: 414 [2020-10-27 01:07:55,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:07:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-27 01:07:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 357. [2020-10-27 01:07:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-27 01:07:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 424 transitions. [2020-10-27 01:07:55,650 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 424 transitions. Word has length 47 [2020-10-27 01:07:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:55,650 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 424 transitions. [2020-10-27 01:07:55,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:07:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 424 transitions. [2020-10-27 01:07:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:07:55,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:55,651 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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 01:07:55,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:07:55,651 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2123028589, now seen corresponding path program 1 times [2020-10-27 01:07:55,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:55,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911066316] [2020-10-27 01:07:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:55,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:58,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:58,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:07:58,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:58,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2432 [2020-10-27 01:07:58,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:58,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:58,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:58,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:07:58,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:58,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:58,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:58,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:58,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911066316] [2020-10-27 01:07:58,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:58,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:58,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571722874] [2020-10-27 01:07:58,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:58,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:58,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:58,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:58,629 INFO L87 Difference]: Start difference. First operand 357 states and 424 transitions. Second operand 12 states. [2020-10-27 01:07:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:59,661 INFO L93 Difference]: Finished difference Result 448 states and 537 transitions. [2020-10-27 01:07:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:07:59,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 01:07:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:59,664 INFO L225 Difference]: With dead ends: 448 [2020-10-27 01:07:59,664 INFO L226 Difference]: Without dead ends: 394 [2020-10-27 01:07:59,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-27 01:07:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 357. [2020-10-27 01:07:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-27 01:07:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 423 transitions. [2020-10-27 01:07:59,703 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 423 transitions. Word has length 47 [2020-10-27 01:07:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:59,704 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 423 transitions. [2020-10-27 01:07:59,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 423 transitions. [2020-10-27 01:07:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:07:59,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:59,705 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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 01:07:59,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:07:59,705 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:59,706 INFO L82 PathProgramCache]: Analyzing trace with hash -916050093, now seen corresponding path program 2 times [2020-10-27 01:07:59,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:59,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174000814] [2020-10-27 01:07:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:59,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:01,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:08:01,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:01,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-10-27 01:08:01,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:01,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:01,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:01,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:08:01,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:02,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:02,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:02,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:02,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:02,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:02,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:02,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174000814] [2020-10-27 01:08:02,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:02,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:02,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439473395] [2020-10-27 01:08:02,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:02,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:02,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:02,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:02,076 INFO L87 Difference]: Start difference. First operand 357 states and 423 transitions. Second operand 15 states. [2020-10-27 01:08:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:04,799 INFO L93 Difference]: Finished difference Result 465 states and 557 transitions. [2020-10-27 01:08:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:04,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-27 01:08:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:04,802 INFO L225 Difference]: With dead ends: 465 [2020-10-27 01:08:04,802 INFO L226 Difference]: Without dead ends: 461 [2020-10-27 01:08:04,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-27 01:08:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 382. [2020-10-27 01:08:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-27 01:08:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 455 transitions. [2020-10-27 01:08:04,834 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 455 transitions. Word has length 47 [2020-10-27 01:08:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:04,834 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 455 transitions. [2020-10-27 01:08:04,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 455 transitions. [2020-10-27 01:08:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:08:04,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:04,835 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:04,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:08:04,836 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:04,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1711039884, now seen corresponding path program 1 times [2020-10-27 01:08:04,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:04,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596440324] [2020-10-27 01:08:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:05,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:05,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:08:05,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:05,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-27 01:08:05,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:05,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:05,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:05,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:08:05,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:06,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:06,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:06,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:06,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596440324] [2020-10-27 01:08:06,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:06,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:06,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362868533] [2020-10-27 01:08:06,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:06,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:06,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:06,121 INFO L87 Difference]: Start difference. First operand 382 states and 455 transitions. Second operand 13 states. [2020-10-27 01:08:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:08,325 INFO L93 Difference]: Finished difference Result 445 states and 528 transitions. [2020-10-27 01:08:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:08:08,326 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-27 01:08:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:08,329 INFO L225 Difference]: With dead ends: 445 [2020-10-27 01:08:08,329 INFO L226 Difference]: Without dead ends: 408 [2020-10-27 01:08:08,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:08:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-27 01:08:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 387. [2020-10-27 01:08:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-27 01:08:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 460 transitions. [2020-10-27 01:08:08,363 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 460 transitions. Word has length 47 [2020-10-27 01:08:08,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:08,363 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 460 transitions. [2020-10-27 01:08:08,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 460 transitions. [2020-10-27 01:08:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:08:08,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:08,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:08,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:08:08,365 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1210993914, now seen corresponding path program 1 times [2020-10-27 01:08:08,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:08,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435307139] [2020-10-27 01:08:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:08,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:08,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:08:08,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:08,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-27 01:08:08,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:08,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:08:08,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:09,357 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-27 01:08:09,534 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-27 01:08:09,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:09,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:09,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:09,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:09,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:09,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:09,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:09,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:09,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435307139] [2020-10-27 01:08:09,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:09,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:09,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284292531] [2020-10-27 01:08:09,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:09,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:09,734 INFO L87 Difference]: Start difference. First operand 387 states and 460 transitions. Second operand 13 states. [2020-10-27 01:08:10,269 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-27 01:08:10,732 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-27 01:08:11,062 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 01:08:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:11,228 INFO L93 Difference]: Finished difference Result 445 states and 529 transitions. [2020-10-27 01:08:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:08:11,229 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-27 01:08:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:11,231 INFO L225 Difference]: With dead ends: 445 [2020-10-27 01:08:11,231 INFO L226 Difference]: Without dead ends: 421 [2020-10-27 01:08:11,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-27 01:08:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 399. [2020-10-27 01:08:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-27 01:08:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 473 transitions. [2020-10-27 01:08:11,283 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 473 transitions. Word has length 48 [2020-10-27 01:08:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:11,283 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 473 transitions. [2020-10-27 01:08:11,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 473 transitions. [2020-10-27 01:08:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:08:11,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:11,284 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:08:11,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:08:11,285 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1859442493, now seen corresponding path program 1 times [2020-10-27 01:08:11,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:11,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925367181] [2020-10-27 01:08:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:11,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:11,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1818 [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:08:13,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:13,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:13,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:13,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:13,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:13,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:13,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925367181] [2020-10-27 01:08:13,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:13,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:13,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384589234] [2020-10-27 01:08:13,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:13,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:13,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:13,724 INFO L87 Difference]: Start difference. First operand 399 states and 473 transitions. Second operand 14 states. [2020-10-27 01:08:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:15,699 INFO L93 Difference]: Finished difference Result 438 states and 519 transitions. [2020-10-27 01:08:15,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:08:15,700 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-27 01:08:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:15,703 INFO L225 Difference]: With dead ends: 438 [2020-10-27 01:08:15,703 INFO L226 Difference]: Without dead ends: 434 [2020-10-27 01:08:15,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:08:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-27 01:08:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 395. [2020-10-27 01:08:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-27 01:08:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 469 transitions. [2020-10-27 01:08:15,738 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 469 transitions. Word has length 48 [2020-10-27 01:08:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:15,738 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 469 transitions. [2020-10-27 01:08:15,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 469 transitions. [2020-10-27 01:08:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:08:15,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:15,739 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:15,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:08:15,739 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:15,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1875823011, now seen corresponding path program 7 times [2020-10-27 01:08:15,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:15,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631821473] [2020-10-27 01:08:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:15,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:17,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3196 [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:08:19,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:19,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:19,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:19,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:19,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:19,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:19,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:19,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:19,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:19,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:19,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631821473] [2020-10-27 01:08:19,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:19,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:19,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64810783] [2020-10-27 01:08:19,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:19,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:19,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:19,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:19,453 INFO L87 Difference]: Start difference. First operand 395 states and 469 transitions. Second operand 15 states. [2020-10-27 01:08:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:21,761 INFO L93 Difference]: Finished difference Result 466 states and 561 transitions. [2020-10-27 01:08:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:08:21,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 01:08:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:21,765 INFO L225 Difference]: With dead ends: 466 [2020-10-27 01:08:21,765 INFO L226 Difference]: Without dead ends: 462 [2020-10-27 01:08:21,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-27 01:08:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 408. [2020-10-27 01:08:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-27 01:08:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 488 transitions. [2020-10-27 01:08:21,827 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 488 transitions. Word has length 48 [2020-10-27 01:08:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:21,827 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 488 transitions. [2020-10-27 01:08:21,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 488 transitions. [2020-10-27 01:08:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:08:21,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:21,829 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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 01:08:21,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:08:21,829 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:21,829 INFO L82 PathProgramCache]: Analyzing trace with hash 490956383, now seen corresponding path program 1 times [2020-10-27 01:08:21,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:21,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311825081] [2020-10-27 01:08:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:21,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:21,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:26,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:26,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:08:26,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:08:26,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 01:08:26,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:08:26,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:27,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:27,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:27,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:27,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:27,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:27,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:27,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:27,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:27,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:27,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311825081] [2020-10-27 01:08:27,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:27,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:27,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2859897] [2020-10-27 01:08:27,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:27,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:27,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:27,313 INFO L87 Difference]: Start difference. First operand 408 states and 488 transitions. Second operand 12 states. [2020-10-27 01:08:28,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:28,701 INFO L93 Difference]: Finished difference Result 457 states and 544 transitions. [2020-10-27 01:08:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:08:28,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-27 01:08:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:28,704 INFO L225 Difference]: With dead ends: 457 [2020-10-27 01:08:28,704 INFO L226 Difference]: Without dead ends: 419 [2020-10-27 01:08:28,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:08:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-10-27 01:08:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 411. [2020-10-27 01:08:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-27 01:08:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 490 transitions. [2020-10-27 01:08:28,738 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 490 transitions. Word has length 48 [2020-10-27 01:08:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:28,738 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 490 transitions. [2020-10-27 01:08:28,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 490 transitions. [2020-10-27 01:08:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:08:28,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:28,739 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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 01:08:28,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:08:28,740 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:28,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:28,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1192020961, now seen corresponding path program 1 times [2020-10-27 01:08:28,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:28,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065338173] [2020-10-27 01:08:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:28,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:32,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:32,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:08:32,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:32,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3764 [2020-10-27 01:08:32,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:32,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:08:32,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:33,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:33,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:33,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:33,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:33,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:33,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:33,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:33,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:33,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:33,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065338173] [2020-10-27 01:08:33,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:33,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:33,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084734251] [2020-10-27 01:08:33,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:33,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:33,575 INFO L87 Difference]: Start difference. First operand 411 states and 490 transitions. Second operand 15 states. [2020-10-27 01:08:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:36,084 INFO L93 Difference]: Finished difference Result 469 states and 559 transitions. [2020-10-27 01:08:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:36,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 01:08:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:36,087 INFO L225 Difference]: With dead ends: 469 [2020-10-27 01:08:36,087 INFO L226 Difference]: Without dead ends: 457 [2020-10-27 01:08:36,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-10-27 01:08:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 415. [2020-10-27 01:08:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-27 01:08:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 494 transitions. [2020-10-27 01:08:36,123 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 494 transitions. Word has length 48 [2020-10-27 01:08:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:36,123 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 494 transitions. [2020-10-27 01:08:36,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 494 transitions. [2020-10-27 01:08:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:08:36,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:36,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:36,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:08:36,124 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:36,124 INFO L82 PathProgramCache]: Analyzing trace with hash 638697102, now seen corresponding path program 1 times [2020-10-27 01:08:36,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:36,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512771911] [2020-10-27 01:08:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:36,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:36,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:36,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:36,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:08:36,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:36,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-27 01:08:36,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:08:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:37,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:37,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:37,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:37,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:37,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:37,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:37,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:37,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:37,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:37,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:37,621 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 01:08:37,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512771911] [2020-10-27 01:08:37,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:37,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973943640] [2020-10-27 01:08:37,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:37,623 INFO L87 Difference]: Start difference. First operand 415 states and 494 transitions. Second operand 13 states. [2020-10-27 01:08:38,502 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-27 01:08:38,930 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 01:08:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:39,032 INFO L93 Difference]: Finished difference Result 437 states and 519 transitions. [2020-10-27 01:08:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:08:39,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 01:08:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:39,036 INFO L225 Difference]: With dead ends: 437 [2020-10-27 01:08:39,036 INFO L226 Difference]: Without dead ends: 433 [2020-10-27 01:08:39,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:08:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-27 01:08:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 403. [2020-10-27 01:08:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-27 01:08:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 481 transitions. [2020-10-27 01:08:39,090 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 481 transitions. Word has length 49 [2020-10-27 01:08:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:39,090 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 481 transitions. [2020-10-27 01:08:39,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 481 transitions. [2020-10-27 01:08:39,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:08:39,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:39,091 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:39,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:08:39,091 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:39,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1550159415, now seen corresponding path program 2 times [2020-10-27 01:08:39,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:39,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105870215] [2020-10-27 01:08:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:42,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:42,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:08:42,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:42,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3129 [2020-10-27 01:08:42,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:42,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:42,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:42,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:08:42,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:42,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:42,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:42,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:42,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:42,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:42,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:42,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:42,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:42,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105870215] [2020-10-27 01:08:42,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:42,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:42,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139710445] [2020-10-27 01:08:42,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:42,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:42,603 INFO L87 Difference]: Start difference. First operand 403 states and 481 transitions. Second operand 13 states. [2020-10-27 01:08:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:43,859 INFO L93 Difference]: Finished difference Result 440 states and 521 transitions. [2020-10-27 01:08:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:08:43,860 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 01:08:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:43,863 INFO L225 Difference]: With dead ends: 440 [2020-10-27 01:08:43,863 INFO L226 Difference]: Without dead ends: 436 [2020-10-27 01:08:43,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:08:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-27 01:08:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 403. [2020-10-27 01:08:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-27 01:08:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 481 transitions. [2020-10-27 01:08:43,899 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 481 transitions. Word has length 49 [2020-10-27 01:08:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:43,899 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 481 transitions. [2020-10-27 01:08:43,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 481 transitions. [2020-10-27 01:08:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:08:43,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:43,900 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:43,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:08:43,900 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:43,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:43,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1032423489, now seen corresponding path program 1 times [2020-10-27 01:08:43,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:43,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866968218] [2020-10-27 01:08:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:45,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:45,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:08:45,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:45,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1582 [2020-10-27 01:08:45,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:45,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:45,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:45,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:08:45,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:45,941 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-27 01:08:46,249 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2020-10-27 01:08:46,399 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-27 01:08:46,662 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-27 01:08:46,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:46,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:46,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:46,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:46,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:46,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:46,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:46,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:46,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:46,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866968218] [2020-10-27 01:08:46,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:46,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:46,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439995616] [2020-10-27 01:08:46,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:46,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:46,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:46,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:46,845 INFO L87 Difference]: Start difference. First operand 403 states and 481 transitions. Second operand 15 states. [2020-10-27 01:08:48,225 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2020-10-27 01:08:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:49,532 INFO L93 Difference]: Finished difference Result 598 states and 725 transitions. [2020-10-27 01:08:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:08:49,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 01:08:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:49,535 INFO L225 Difference]: With dead ends: 598 [2020-10-27 01:08:49,535 INFO L226 Difference]: Without dead ends: 594 [2020-10-27 01:08:49,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:08:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-10-27 01:08:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 477. [2020-10-27 01:08:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-27 01:08:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 578 transitions. [2020-10-27 01:08:49,576 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 578 transitions. Word has length 49 [2020-10-27 01:08:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:49,576 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 578 transitions. [2020-10-27 01:08:49,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 578 transitions. [2020-10-27 01:08:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:08:49,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:49,577 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 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] [2020-10-27 01:08:49,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:08:49,578 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1021758869, now seen corresponding path program 8 times [2020-10-27 01:08:49,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:49,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533770441] [2020-10-27 01:08:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:49,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:53,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:08:53,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:53,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3462 [2020-10-27 01:08:53,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:53,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:53,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:53,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:08:53,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:53,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:53,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:53,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:53,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:53,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:53,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:08:53,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533770441] [2020-10-27 01:08:53,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:53,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:53,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039993870] [2020-10-27 01:08:53,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:53,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:53,839 INFO L87 Difference]: Start difference. First operand 477 states and 578 transitions. Second operand 13 states. [2020-10-27 01:08:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:55,139 INFO L93 Difference]: Finished difference Result 601 states and 740 transitions. [2020-10-27 01:08:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:08:55,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 01:08:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:55,141 INFO L225 Difference]: With dead ends: 601 [2020-10-27 01:08:55,141 INFO L226 Difference]: Without dead ends: 506 [2020-10-27 01:08:55,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-10-27 01:08:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 477. [2020-10-27 01:08:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-27 01:08:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 576 transitions. [2020-10-27 01:08:55,184 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 576 transitions. Word has length 49 [2020-10-27 01:08:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:55,184 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 576 transitions. [2020-10-27 01:08:55,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 576 transitions. [2020-10-27 01:08:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:08:55,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:55,185 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:55,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:08:55,185 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash 174896904, now seen corresponding path program 1 times [2020-10-27 01:08:55,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:55,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477462467] [2020-10-27 01:08:55,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:55,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3259 [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:08:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:59,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:59,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:59,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:59,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:59,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:59,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:59,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:59,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477462467] [2020-10-27 01:08:59,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:59,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:59,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852900576] [2020-10-27 01:08:59,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:59,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:59,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:59,163 INFO L87 Difference]: Start difference. First operand 477 states and 576 transitions. Second operand 15 states.