/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:46:04,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:46:04,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:46:04,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:46:04,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:46:04,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:46:04,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:46:04,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:46:04,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:46:04,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:46:04,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:46:04,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:46:04,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:46:04,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:46:04,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:46:04,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:46:04,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:46:04,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:46:04,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:46:04,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:46:04,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:46:04,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:46:04,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:46:04,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:46:04,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:46:04,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:46:04,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:46:04,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:46:04,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:46:04,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:46:04,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:46:04,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:46:04,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:46:04,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:46:04,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:46:04,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:46:04,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:46:04,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:46:04,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:46:04,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:46:04,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:46:04,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:46:05,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:46:05,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:46:05,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:46:05,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:46:05,033 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:46:05,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:46:05,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:46:05,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:46:05,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:46:05,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:46:05,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:46:05,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:46:05,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:46:05,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:46:05,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:46:05,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:46:05,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:46:05,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:46:05,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:46:05,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:46:05,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:46:05,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:05,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:46:05,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:46:05,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:46:05,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:46:05,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:46:05,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:46:05,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:46:05,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:46:05,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:46:05,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:46:05,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:46:05,485 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:46:05,486 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:46:05,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i [2020-10-27 19:46:05,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57703925b/24a4b283e95146a89b732cb33ed7f5cf/FLAG20e5eb1f9 [2020-10-27 19:46:06,418 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:46:06,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-simple-white-blue-2.i [2020-10-27 19:46:06,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57703925b/24a4b283e95146a89b732cb33ed7f5cf/FLAG20e5eb1f9 [2020-10-27 19:46:06,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57703925b/24a4b283e95146a89b732cb33ed7f5cf [2020-10-27 19:46:06,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:46:06,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:46:06,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:06,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:46:06,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:46:06,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:06" (1/1) ... [2020-10-27 19:46:06,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc46986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:06, skipping insertion in model container [2020-10-27 19:46:06,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:06" (1/1) ... [2020-10-27 19:46:06,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:46:06,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:46:07,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:07,145 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:46:07,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:07,264 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:46:07,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07 WrapperNode [2020-10-27 19:46:07,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:07,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:46:07,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:46:07,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:46:07,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (1/1) ... [2020-10-27 19:46:07,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (1/1) ... [2020-10-27 19:46:07,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (1/1) ... [2020-10-27 19:46:07,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (1/1) ... [2020-10-27 19:46:07,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (1/1) ... [2020-10-27 19:46:07,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (1/1) ... [2020-10-27 19:46:07,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (1/1) ... [2020-10-27 19:46:07,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:07,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:07,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:07,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:07,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:07,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:07,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:07,447 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:07,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:07,447 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:07,449 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:07,449 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:07,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:07,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:07,451 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:07,452 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:07,453 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:07,454 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:07,455 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:07,456 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:07,457 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:07,458 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:07,458 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:07,459 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:07,460 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:07,461 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:07,462 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:07,463 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:07,464 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:07,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:07,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:07,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:07,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:07,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:08,547 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:08,548 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 19:46:08,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:08 BoogieIcfgContainer [2020-10-27 19:46:08,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:08,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:08,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:08,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:08,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:46:06" (1/3) ... [2020-10-27 19:46:08,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30309daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:08, skipping insertion in model container [2020-10-27 19:46:08,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:07" (2/3) ... [2020-10-27 19:46:08,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30309daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:08, skipping insertion in model container [2020-10-27 19:46:08,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:08" (3/3) ... [2020-10-27 19:46:08,560 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2020-10-27 19:46:08,574 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:08,580 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:08,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:08,623 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:08,623 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:08,623 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:08,623 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:08,624 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:08,624 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:08,624 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:08,624 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 19:46:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:46:08,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:08,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:08,652 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1655213968, now seen corresponding path program 1 times [2020-10-27 19:46:08,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:08,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330710070] [2020-10-27 19:46:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:08,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:08,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:09,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:46:09,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:09,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-27 19:46:09,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:09,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:09,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:46:09,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:09,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 19:46:09,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:09,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:09,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:09,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:09,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:09,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:09,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:09,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:09,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:09,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:09,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:09,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330710070] [2020-10-27 19:46:09,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:09,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:46:09,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997483283] [2020-10-27 19:46:09,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:46:09,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:09,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:46:09,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:09,669 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 19:46:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:09,804 INFO L93 Difference]: Finished difference Result 62 states and 94 transitions. [2020-10-27 19:46:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:46:09,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 19:46:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:09,816 INFO L225 Difference]: With dead ends: 62 [2020-10-27 19:46:09,816 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 19:46:09,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 19:46:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 19:46:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 19:46:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-27 19:46:09,861 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2020-10-27 19:46:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:09,861 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-27 19:46:09,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:46:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-27 19:46:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 19:46:09,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:09,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:09,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:09,863 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:09,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1708326079, now seen corresponding path program 1 times [2020-10-27 19:46:09,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:09,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990324667] [2020-10-27 19:46:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:09,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:10,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:46:10,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:10,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 19:46:10,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:10,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:10,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:10,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:10,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:10,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:10,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:10,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:10,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:10,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990324667] [2020-10-27 19:46:10,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:10,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:10,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802058052] [2020-10-27 19:46:10,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:10,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:10,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:10,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:10,289 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 8 states. [2020-10-27 19:46:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:10,673 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-10-27 19:46:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:10,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-27 19:46:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:10,678 INFO L225 Difference]: With dead ends: 59 [2020-10-27 19:46:10,678 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:46:10,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:46:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2020-10-27 19:46:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 19:46:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-10-27 19:46:10,690 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2020-10-27 19:46:10,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:10,691 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-10-27 19:46:10,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-10-27 19:46:10,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:46:10,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:10,692 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:10,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:10,693 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:10,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1907723868, now seen corresponding path program 1 times [2020-10-27 19:46:10,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:10,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041355386] [2020-10-27 19:46:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:11,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:11,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:46:11,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:11,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-27 19:46:11,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:46:11,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:11,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:11,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:11,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:11,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:11,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:11,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:11,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:11,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:11,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041355386] [2020-10-27 19:46:11,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:11,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:11,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548687778] [2020-10-27 19:46:11,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:11,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:11,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:11,465 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 6 states. [2020-10-27 19:46:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:11,666 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-27 19:46:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:11,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 19:46:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:11,667 INFO L225 Difference]: With dead ends: 55 [2020-10-27 19:46:11,668 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 19:46:11,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 19:46:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-27 19:46:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:46:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-27 19:46:11,677 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2020-10-27 19:46:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:11,678 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-27 19:46:11,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-27 19:46:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:46:11,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:11,679 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:11,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:11,680 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:11,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1515612570, now seen corresponding path program 1 times [2020-10-27 19:46:11,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:11,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338224650] [2020-10-27 19:46:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:11,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:11,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:11,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:46:11,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:11,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-27 19:46:11,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:11,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:11,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:11,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:11,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:12,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:12,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:12,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:12,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338224650] [2020-10-27 19:46:12,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:12,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:12,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658609779] [2020-10-27 19:46:12,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:12,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:12,243 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 9 states. [2020-10-27 19:46:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:12,930 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2020-10-27 19:46:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:12,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-27 19:46:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:12,933 INFO L225 Difference]: With dead ends: 67 [2020-10-27 19:46:12,933 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 19:46:12,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 19:46:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 32. [2020-10-27 19:46:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 19:46:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-27 19:46:12,948 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 21 [2020-10-27 19:46:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:12,950 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-27 19:46:12,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-27 19:46:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:12,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:12,951 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:12,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:12,952 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 799266854, now seen corresponding path program 1 times [2020-10-27 19:46:12,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:12,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436967331] [2020-10-27 19:46:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:13,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-27 19:46:13,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:46:13,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:13,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:13,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:13,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:13,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:13,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436967331] [2020-10-27 19:46:13,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:13,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:13,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819528565] [2020-10-27 19:46:13,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:13,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:13,321 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2020-10-27 19:46:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:13,887 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-27 19:46:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:13,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:46:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:13,889 INFO L225 Difference]: With dead ends: 67 [2020-10-27 19:46:13,889 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 19:46:13,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 19:46:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-10-27 19:46:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 19:46:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-27 19:46:13,905 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 22 [2020-10-27 19:46:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:13,905 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-27 19:46:13,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:13,906 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-27 19:46:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:46:13,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:13,907 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 19:46:13,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:13,907 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1270005385, now seen corresponding path program 1 times [2020-10-27 19:46:13,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:13,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026021889] [2020-10-27 19:46:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:14,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:46:14,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:14,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-27 19:46:14,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:14,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:14,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:46:14,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:46:14,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:14,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:14,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:14,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:14,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:46:14,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:14,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:14,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:14,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:14,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:14,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026021889] [2020-10-27 19:46:14,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:14,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:14,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744094715] [2020-10-27 19:46:14,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:14,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:14,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:14,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:14,397 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2020-10-27 19:46:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:14,629 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-27 19:46:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:14,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 19:46:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:14,631 INFO L225 Difference]: With dead ends: 58 [2020-10-27 19:46:14,631 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:46:14,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:46:14,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-10-27 19:46:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 19:46:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-27 19:46:14,639 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2020-10-27 19:46:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:14,639 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-27 19:46:14,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-27 19:46:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:46:14,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:14,641 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 19:46:14,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:14,641 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1663032395, now seen corresponding path program 1 times [2020-10-27 19:46:14,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:14,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802102636] [2020-10-27 19:46:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:14,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:15,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:46:15,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:15,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 19:46:15,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:15,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:46:15,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:15,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:15,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:15,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:15,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:15,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:15,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:15,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:15,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:15,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:15,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802102636] [2020-10-27 19:46:15,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:15,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 19:46:15,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078817644] [2020-10-27 19:46:15,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:15,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:15,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:15,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:15,461 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 9 states. [2020-10-27 19:46:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:15,857 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-27 19:46:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:15,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 19:46:15,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:15,859 INFO L225 Difference]: With dead ends: 84 [2020-10-27 19:46:15,860 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 19:46:15,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 19:46:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-27 19:46:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:46:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-27 19:46:15,870 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2020-10-27 19:46:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:15,871 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-27 19:46:15,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-27 19:46:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 19:46:15,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:15,872 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] [2020-10-27 19:46:15,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:15,873 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2042394987, now seen corresponding path program 1 times [2020-10-27 19:46:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:15,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758764115] [2020-10-27 19:46:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:15,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:16,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:16,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 19:46:16,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:16,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-27 19:46:16,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:16,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:16,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:16,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:16,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:16,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:16,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:16,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:16,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:16,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:16,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:16,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758764115] [2020-10-27 19:46:16,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:16,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:16,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365525450] [2020-10-27 19:46:16,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:16,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:16,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:16,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:16,434 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-10-27 19:46:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:17,229 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-27 19:46:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:17,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 19:46:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:17,231 INFO L225 Difference]: With dead ends: 72 [2020-10-27 19:46:17,231 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 19:46:17,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:46:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 19:46:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-10-27 19:46:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 19:46:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-27 19:46:17,240 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 24 [2020-10-27 19:46:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:17,241 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-27 19:46:17,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-27 19:46:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:17,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:17,244 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] [2020-10-27 19:46:17,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:17,244 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:17,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:17,245 INFO L82 PathProgramCache]: Analyzing trace with hash 917091098, now seen corresponding path program 1 times [2020-10-27 19:46:17,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:17,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919830683] [2020-10-27 19:46:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:17,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:17,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:17,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:17,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 19:46:17,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:46:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:46:17,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:17,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:17,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:17,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:17,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:17,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:17,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:17,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:17,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919830683] [2020-10-27 19:46:17,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:17,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:46:17,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157344904] [2020-10-27 19:46:17,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:46:17,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:17,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:46:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:17,483 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 7 states. [2020-10-27 19:46:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:17,760 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-27 19:46:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:17,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 19:46:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:17,761 INFO L225 Difference]: With dead ends: 76 [2020-10-27 19:46:17,761 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:46:17,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:46:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2020-10-27 19:46:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:46:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-27 19:46:17,781 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 25 [2020-10-27 19:46:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:17,782 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-27 19:46:17,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:46:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-27 19:46:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:17,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:17,785 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:17,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:17,785 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1327373729, now seen corresponding path program 1 times [2020-10-27 19:46:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:17,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472798598] [2020-10-27 19:46:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:18,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:18,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-27 19:46:18,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:18,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:46:18,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:18,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:18,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:18,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 19:46:18,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:18,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:18,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:18,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:18,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472798598] [2020-10-27 19:46:18,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:18,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:18,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155734697] [2020-10-27 19:46:18,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:18,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:18,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:18,665 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2020-10-27 19:46:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:19,394 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-27 19:46:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:19,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 19:46:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:19,396 INFO L225 Difference]: With dead ends: 90 [2020-10-27 19:46:19,396 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 19:46:19,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 19:46:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2020-10-27 19:46:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 19:46:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-27 19:46:19,406 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 26 [2020-10-27 19:46:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:19,406 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-27 19:46:19,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-27 19:46:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:19,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:19,407 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] [2020-10-27 19:46:19,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:19,408 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:19,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880250, now seen corresponding path program 2 times [2020-10-27 19:46:19,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:19,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931519830] [2020-10-27 19:46:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:19,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:19,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:19,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:19,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-27 19:46:19,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:19,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:19,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:19,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:46:19,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:19,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:19,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:19,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:19,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:19,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:19,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:19,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:19,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:19,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:19,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931519830] [2020-10-27 19:46:19,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:19,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:19,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868704034] [2020-10-27 19:46:19,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:19,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:19,967 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 10 states. [2020-10-27 19:46:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:20,958 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2020-10-27 19:46:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:46:20,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 19:46:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:20,959 INFO L225 Difference]: With dead ends: 102 [2020-10-27 19:46:20,960 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 19:46:20,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:46:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 19:46:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2020-10-27 19:46:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 19:46:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-10-27 19:46:20,972 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 27 [2020-10-27 19:46:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:20,972 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-10-27 19:46:20,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-10-27 19:46:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:46:20,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:20,973 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] [2020-10-27 19:46:20,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:20,974 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1362521924, now seen corresponding path program 1 times [2020-10-27 19:46:20,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:20,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597557765] [2020-10-27 19:46:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:21,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:23,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:46:23,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:23,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2244 [2020-10-27 19:46:23,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:23,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:23,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:23,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:46:23,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:23,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:23,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:23,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:23,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:23,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:23,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:23,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:23,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:23,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:23,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:23,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597557765] [2020-10-27 19:46:23,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:23,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:23,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341037530] [2020-10-27 19:46:23,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:23,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:23,422 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 10 states. [2020-10-27 19:46:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:23,882 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2020-10-27 19:46:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:23,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 19:46:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:23,884 INFO L225 Difference]: With dead ends: 89 [2020-10-27 19:46:23,884 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 19:46:23,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 19:46:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2020-10-27 19:46:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 19:46:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-10-27 19:46:23,900 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 28 [2020-10-27 19:46:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:23,901 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-10-27 19:46:23,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-10-27 19:46:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:46:23,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:23,902 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] [2020-10-27 19:46:23,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:23,907 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash 320949016, now seen corresponding path program 1 times [2020-10-27 19:46:23,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:23,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918236233] [2020-10-27 19:46:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:23,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:46:24,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:24,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 921 [2020-10-27 19:46:24,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:24,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:46:24,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:25,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:25,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:25,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:25,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:25,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:25,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:25,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:25,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918236233] [2020-10-27 19:46:25,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:25,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:25,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555111720] [2020-10-27 19:46:25,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:25,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:25,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:25,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:25,209 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 11 states. [2020-10-27 19:46:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:26,209 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2020-10-27 19:46:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:46:26,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 19:46:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:26,210 INFO L225 Difference]: With dead ends: 109 [2020-10-27 19:46:26,210 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 19:46:26,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:46:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 19:46:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 70. [2020-10-27 19:46:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 19:46:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-10-27 19:46:26,219 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2020-10-27 19:46:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:26,220 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-10-27 19:46:26,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-10-27 19:46:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:46:26,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:26,221 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:26,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:26,221 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:26,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:26,222 INFO L82 PathProgramCache]: Analyzing trace with hash 260987172, now seen corresponding path program 2 times [2020-10-27 19:46:26,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:26,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721519950] [2020-10-27 19:46:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:46:27,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:27,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-10-27 19:46:27,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:46:27,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,521 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-27 19:46:27,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:27,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:27,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:27,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:27,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:27,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:27,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:27,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721519950] [2020-10-27 19:46:27,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:27,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:27,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975190652] [2020-10-27 19:46:27,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:27,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:27,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:27,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:27,679 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 12 states. [2020-10-27 19:46:28,834 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-27 19:46:29,063 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-27 19:46:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:29,525 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-27 19:46:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:46:29,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 19:46:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:29,527 INFO L225 Difference]: With dead ends: 121 [2020-10-27 19:46:29,528 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 19:46:29,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:46:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 19:46:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-27 19:46:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:46:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-10-27 19:46:29,544 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 28 [2020-10-27 19:46:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:29,544 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-10-27 19:46:29,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-10-27 19:46:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:46:29,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:29,548 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:29,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:46:29,548 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:29,549 INFO L82 PathProgramCache]: Analyzing trace with hash -132039838, now seen corresponding path program 1 times [2020-10-27 19:46:29,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:29,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616605696] [2020-10-27 19:46:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:46:32,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:46:32,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3027 [2020-10-27 19:46:32,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:32,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 19:46:32,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:32,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:32,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:32,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:32,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:32,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 19:46:32,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616605696] [2020-10-27 19:46:32,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:32,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110976051] [2020-10-27 19:46:32,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:32,701 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 6 states. [2020-10-27 19:46:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:32,904 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2020-10-27 19:46:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:32,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-27 19:46:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:32,906 INFO L225 Difference]: With dead ends: 113 [2020-10-27 19:46:32,906 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:46:32,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:46:32,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2020-10-27 19:46:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:46:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-27 19:46:32,921 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 28 [2020-10-27 19:46:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:32,921 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-27 19:46:32,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-27 19:46:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:32,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:32,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:32,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:46:32,923 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:32,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:32,924 INFO L82 PathProgramCache]: Analyzing trace with hash -902328698, now seen corresponding path program 1 times [2020-10-27 19:46:32,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:32,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747173481] [2020-10-27 19:46:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:33,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:33,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:33,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 19:46:33,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:33,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:33,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:33,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:46:33,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:33,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:33,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:33,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:33,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:33,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:33,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:33,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:33,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:33,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747173481] [2020-10-27 19:46:33,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:33,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:33,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469680510] [2020-10-27 19:46:33,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:33,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:33,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:33,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:33,591 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 11 states. [2020-10-27 19:46:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:34,587 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-27 19:46:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:34,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 19:46:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:34,590 INFO L225 Difference]: With dead ends: 101 [2020-10-27 19:46:34,590 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 19:46:34,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 19:46:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-27 19:46:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 19:46:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-10-27 19:46:34,604 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 29 [2020-10-27 19:46:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:34,604 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-10-27 19:46:34,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-10-27 19:46:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:34,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:34,605 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] [2020-10-27 19:46:34,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:46:34,606 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash -598719657, now seen corresponding path program 1 times [2020-10-27 19:46:34,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:34,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868683883] [2020-10-27 19:46:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:34,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:35,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:35,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:35,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-27 19:46:35,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:35,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:46:35,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:35,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:35,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:35,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:35,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:35,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:35,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:35,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:35,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:35,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868683883] [2020-10-27 19:46:35,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:35,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:35,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046487207] [2020-10-27 19:46:35,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:35,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:35,582 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2020-10-27 19:46:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:36,102 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-10-27 19:46:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:36,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 19:46:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:36,104 INFO L225 Difference]: With dead ends: 100 [2020-10-27 19:46:36,104 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 19:46:36,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 19:46:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-27 19:46:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 19:46:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-27 19:46:36,117 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 29 [2020-10-27 19:46:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:36,117 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-27 19:46:36,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-27 19:46:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 19:46:36,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:36,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:36,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:46:36,119 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:36,119 INFO L82 PathProgramCache]: Analyzing trace with hash -693539371, now seen corresponding path program 3 times [2020-10-27 19:46:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:36,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77604857] [2020-10-27 19:46:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 19:46:36,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-27 19:46:36,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:36,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:36,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:46:36,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:36,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:36,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:36,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77604857] [2020-10-27 19:46:36,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:36,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:36,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070303332] [2020-10-27 19:46:36,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:36,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:36,998 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 12 states. [2020-10-27 19:46:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:38,152 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-27 19:46:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:46:38,153 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 19:46:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:38,154 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:46:38,154 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 19:46:38,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:46:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 19:46:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-27 19:46:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 19:46:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-10-27 19:46:38,175 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 29 [2020-10-27 19:46:38,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:38,175 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-10-27 19:46:38,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-10-27 19:46:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:38,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:38,176 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 19:46:38,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:46:38,177 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash 557747645, now seen corresponding path program 1 times [2020-10-27 19:46:38,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:38,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965354069] [2020-10-27 19:46:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:38,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:38,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:38,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:38,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 19:46:38,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:38,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:38,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:38,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:46:38,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:38,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:38,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:38,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:38,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:38,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:38,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:38,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:38,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:38,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:38,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:38,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965354069] [2020-10-27 19:46:38,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:38,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:38,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521109926] [2020-10-27 19:46:38,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:38,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:38,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:38,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:38,733 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 11 states. [2020-10-27 19:46:39,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:39,416 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-27 19:46:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:39,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 19:46:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:39,419 INFO L225 Difference]: With dead ends: 116 [2020-10-27 19:46:39,419 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 19:46:39,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 19:46:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2020-10-27 19:46:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 19:46:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-27 19:46:39,431 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 30 [2020-10-27 19:46:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:39,431 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-27 19:46:39,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-27 19:46:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:39,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:39,432 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] [2020-10-27 19:46:39,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:46:39,433 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1231009591, now seen corresponding path program 2 times [2020-10-27 19:46:39,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:39,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370096681] [2020-10-27 19:46:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:41,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:41,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:41,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1915 [2020-10-27 19:46:41,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:41,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:41,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:41,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:46:41,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:41,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:41,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:41,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:41,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:41,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:41,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:41,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:41,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:41,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:41,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370096681] [2020-10-27 19:46:41,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:41,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:41,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890673130] [2020-10-27 19:46:41,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:41,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:41,858 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 12 states. [2020-10-27 19:46:42,469 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-27 19:46:43,226 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-10-27 19:46:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:43,473 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions. [2020-10-27 19:46:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:46:43,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 19:46:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:43,475 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:46:43,475 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 19:46:43,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:46:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 19:46:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-27 19:46:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 19:46:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-10-27 19:46:43,488 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 30 [2020-10-27 19:46:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:43,489 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-10-27 19:46:43,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-10-27 19:46:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:43,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:43,490 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] [2020-10-27 19:46:43,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:46:43,495 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2022384797, now seen corresponding path program 2 times [2020-10-27 19:46:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:43,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538200694] [2020-10-27 19:46:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:43,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:44,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:46,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:46,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3296 [2020-10-27 19:46:46,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:46:46,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:46,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:46,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:46,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:46,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:46,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:46,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:46,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:46,958 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 19:46:46,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538200694] [2020-10-27 19:46:46,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:46,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:46,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998865947] [2020-10-27 19:46:46,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:46,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:46,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:46,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:46,963 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 9 states. [2020-10-27 19:46:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:47,455 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-10-27 19:46:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:47,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 19:46:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:47,457 INFO L225 Difference]: With dead ends: 109 [2020-10-27 19:46:47,457 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 19:46:47,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 19:46:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-10-27 19:46:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 19:46:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-10-27 19:46:47,471 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 30 [2020-10-27 19:46:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:47,472 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-10-27 19:46:47,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-10-27 19:46:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:47,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:47,473 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:47,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:46:47,473 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:47,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1962422953, now seen corresponding path program 3 times [2020-10-27 19:46:47,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:47,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556653714] [2020-10-27 19:46:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:47,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:48,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:48,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:48,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:48,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-27 19:46:48,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:48,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:48,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:46:48,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:49,038 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-27 19:46:49,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:49,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:49,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:49,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:49,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:49,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:49,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556653714] [2020-10-27 19:46:49,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:49,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:49,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238983673] [2020-10-27 19:46:49,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:49,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:49,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:49,208 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 13 states. [2020-10-27 19:46:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:50,113 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-10-27 19:46:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:50,114 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 19:46:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:50,115 INFO L225 Difference]: With dead ends: 122 [2020-10-27 19:46:50,115 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 19:46:50,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:46:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 19:46:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 91. [2020-10-27 19:46:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 19:46:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-10-27 19:46:50,135 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 30 [2020-10-27 19:46:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:50,135 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-10-27 19:46:50,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-10-27 19:46:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:50,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:50,136 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 19:46:50,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:46:50,136 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:50,137 INFO L82 PathProgramCache]: Analyzing trace with hash 302572961, now seen corresponding path program 2 times [2020-10-27 19:46:50,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:50,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412319485] [2020-10-27 19:46:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:50,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:50,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:50,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:50,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-27 19:46:50,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:50,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:50,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:50,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:50,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:51,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:51,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:51,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:51,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:51,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:51,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:51,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:51,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:51,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:51,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:51,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412319485] [2020-10-27 19:46:51,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:51,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:51,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857589554] [2020-10-27 19:46:51,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:51,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:51,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:51,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:51,352 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 13 states. [2020-10-27 19:46:52,687 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 67 [2020-10-27 19:46:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:53,319 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2020-10-27 19:46:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:46:53,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 19:46:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:53,321 INFO L225 Difference]: With dead ends: 127 [2020-10-27 19:46:53,322 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 19:46:53,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:46:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 19:46:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 91. [2020-10-27 19:46:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 19:46:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-10-27 19:46:53,340 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 31 [2020-10-27 19:46:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:53,340 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-10-27 19:46:53,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-10-27 19:46:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:53,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:53,343 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 19:46:53,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:46:53,343 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash 606182002, now seen corresponding path program 2 times [2020-10-27 19:46:53,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:53,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970820155] [2020-10-27 19:46:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:53,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:54,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:54,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-27 19:46:54,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:46:54,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:54,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:54,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:54,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:54,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:54,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:54,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:54,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970820155] [2020-10-27 19:46:54,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:54,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:54,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375270222] [2020-10-27 19:46:54,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:54,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:54,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:54,469 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 12 states. [2020-10-27 19:46:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:55,749 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2020-10-27 19:46:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:46:55,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 19:46:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:55,751 INFO L225 Difference]: With dead ends: 121 [2020-10-27 19:46:55,751 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 19:46:55,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:46:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 19:46:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2020-10-27 19:46:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:46:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2020-10-27 19:46:55,766 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 31 [2020-10-27 19:46:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:55,766 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2020-10-27 19:46:55,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2020-10-27 19:46:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:55,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:55,767 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] [2020-10-27 19:46:55,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:46:55,767 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash 511362288, now seen corresponding path program 4 times [2020-10-27 19:46:55,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:55,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731223369] [2020-10-27 19:46:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:55,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:56,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:56,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:56,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-27 19:46:56,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:56,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:56,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:56,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:56,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:56,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:56,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:56,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:56,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731223369] [2020-10-27 19:46:56,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:56,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:56,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667257927] [2020-10-27 19:46:56,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:56,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:56,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:56,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:56,768 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand 13 states. [2020-10-27 19:46:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:58,536 INFO L93 Difference]: Finished difference Result 159 states and 191 transitions. [2020-10-27 19:46:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:46:58,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 19:46:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:58,539 INFO L225 Difference]: With dead ends: 159 [2020-10-27 19:46:58,539 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 19:46:58,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:46:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 19:46:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 99. [2020-10-27 19:46:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 19:46:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-10-27 19:46:58,552 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 31 [2020-10-27 19:46:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:58,552 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-10-27 19:46:58,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-10-27 19:46:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:58,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:58,553 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] [2020-10-27 19:46:58,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:46:58,554 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:58,554 INFO L82 PathProgramCache]: Analyzing trace with hash 487963426, now seen corresponding path program 2 times [2020-10-27 19:46:58,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:58,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417312747] [2020-10-27 19:46:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:58,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:46:58,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:58,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 19:46:58,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:58,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:58,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:58,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:46:58,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:58,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:58,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:58,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:58,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:58,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:58,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:58,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:58,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:58,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:58,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:58,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417312747] [2020-10-27 19:46:58,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:58,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:58,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310474943] [2020-10-27 19:46:58,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:58,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:58,931 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 11 states. [2020-10-27 19:46:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:59,427 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-10-27 19:46:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:59,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 19:46:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:59,428 INFO L225 Difference]: With dead ends: 115 [2020-10-27 19:46:59,429 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:46:59,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:46:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:46:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-27 19:46:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 19:46:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2020-10-27 19:46:59,443 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 32 [2020-10-27 19:46:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:59,443 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2020-10-27 19:46:59,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2020-10-27 19:46:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:46:59,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:59,444 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] [2020-10-27 19:46:59,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:46:59,444 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash -29974689, now seen corresponding path program 3 times [2020-10-27 19:46:59,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:59,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349469044] [2020-10-27 19:46:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:59,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:00,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:47:00,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:00,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-27 19:47:00,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:00,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:47:00,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:01,035 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-27 19:47:01,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:01,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:01,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:01,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:01,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:01,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:01,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:01,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:01,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:01,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:01,395 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 19:47:01,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349469044] [2020-10-27 19:47:01,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:01,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:47:01,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416559954] [2020-10-27 19:47:01,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:47:01,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:47:01,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:01,399 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand 15 states. [2020-10-27 19:47:02,013 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 19:47:02,782 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 19:47:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:03,502 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2020-10-27 19:47:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:47:03,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-27 19:47:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:03,504 INFO L225 Difference]: With dead ends: 138 [2020-10-27 19:47:03,504 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 19:47:03,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:47:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 19:47:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 97. [2020-10-27 19:47:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 19:47:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2020-10-27 19:47:03,516 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 32 [2020-10-27 19:47:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:03,516 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2020-10-27 19:47:03,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:47:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2020-10-27 19:47:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:47:03,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:03,517 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:03,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:47:03,517 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash 980797264, now seen corresponding path program 5 times [2020-10-27 19:47:03,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:03,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655728478] [2020-10-27 19:47:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:03,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:47:03,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:03,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-27 19:47:03,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:03,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:47:03,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:04,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:04,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:04,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:04,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:04,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:04,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:04,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:04,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:04,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:04,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:04,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655728478] [2020-10-27 19:47:04,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:04,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:04,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032691569] [2020-10-27 19:47:04,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:04,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:04,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:04,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:04,236 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 12 states. [2020-10-27 19:47:05,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:05,746 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2020-10-27 19:47:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:47:05,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 19:47:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:05,748 INFO L225 Difference]: With dead ends: 145 [2020-10-27 19:47:05,748 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 19:47:05,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:47:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 19:47:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2020-10-27 19:47:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 19:47:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-10-27 19:47:05,763 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 32 [2020-10-27 19:47:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:05,763 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-10-27 19:47:05,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-10-27 19:47:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:47:05,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:05,764 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] [2020-10-27 19:47:05,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:47:05,764 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash -520821970, now seen corresponding path program 3 times [2020-10-27 19:47:05,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:05,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109432700] [2020-10-27 19:47:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:05,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:07,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:07,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:47:07,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:07,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1875 [2020-10-27 19:47:07,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:47:07,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:08,080 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-27 19:47:08,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:08,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:08,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:08,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:08,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:08,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:08,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:08,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:08,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:08,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109432700] [2020-10-27 19:47:08,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:08,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:08,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034812381] [2020-10-27 19:47:08,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:08,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:08,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:08,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:08,257 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 13 states. [2020-10-27 19:47:09,117 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-27 19:47:09,317 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-27 19:47:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:10,075 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2020-10-27 19:47:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:47:10,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 19:47:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:10,077 INFO L225 Difference]: With dead ends: 137 [2020-10-27 19:47:10,077 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 19:47:10,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:47:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 19:47:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-27 19:47:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 19:47:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-27 19:47:10,093 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 32 [2020-10-27 19:47:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:10,094 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-27 19:47:10,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-27 19:47:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:47:10,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:10,095 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:10,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:47:10,095 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:10,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1761203470, now seen corresponding path program 4 times [2020-10-27 19:47:10,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:10,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752979862] [2020-10-27 19:47:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:10,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:11,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:12,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:47:12,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:12,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2341 [2020-10-27 19:47:12,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:12,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:12,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:12,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:47:12,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:12,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:12,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:12,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:12,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:12,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:12,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:12,908 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 19:47:12,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752979862] [2020-10-27 19:47:12,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:12,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862987841] [2020-10-27 19:47:12,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:12,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:12,909 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 13 states. [2020-10-27 19:47:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:13,644 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2020-10-27 19:47:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:13,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 19:47:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:13,648 INFO L225 Difference]: With dead ends: 132 [2020-10-27 19:47:13,648 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 19:47:13,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:47:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 19:47:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 104. [2020-10-27 19:47:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 19:47:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2020-10-27 19:47:13,663 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 32 [2020-10-27 19:47:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:13,663 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2020-10-27 19:47:13,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2020-10-27 19:47:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:47:13,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:13,664 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:13,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:47:13,664 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:13,665 INFO L82 PathProgramCache]: Analyzing trace with hash 719630562, now seen corresponding path program 3 times [2020-10-27 19:47:13,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:13,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787888552] [2020-10-27 19:47:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:13,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:14,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:14,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:18,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:47:18,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:47:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4893 [2020-10-27 19:47:18,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:47:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:18,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:47:18,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:18,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:18,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:18,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:18,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:18,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:18,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:18,773 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 19:47:18,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787888552] [2020-10-27 19:47:18,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:18,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:18,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878684437] [2020-10-27 19:47:18,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:18,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:18,775 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 10 states. [2020-10-27 19:47:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:19,396 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2020-10-27 19:47:19,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:19,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 19:47:19,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:19,398 INFO L225 Difference]: With dead ends: 124 [2020-10-27 19:47:19,398 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 19:47:19,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 19:47:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-10-27 19:47:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 19:47:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2020-10-27 19:47:19,410 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 32 [2020-10-27 19:47:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:19,411 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2020-10-27 19:47:19,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2020-10-27 19:47:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:47:19,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:19,412 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] [2020-10-27 19:47:19,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:47:19,412 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1008972469, now seen corresponding path program 3 times [2020-10-27 19:47:19,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:19,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096766641] [2020-10-27 19:47:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:19,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:19,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:19,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:20,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:47:20,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:20,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-27 19:47:20,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:20,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:20,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:20,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:47:20,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:20,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:20,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:20,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:20,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:20,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:20,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:20,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:20,825 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 19:47:20,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096766641] [2020-10-27 19:47:20,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:20,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:20,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248642485] [2020-10-27 19:47:20,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:20,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:20,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:20,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:20,827 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand 12 states. [2020-10-27 19:47:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:21,681 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2020-10-27 19:47:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:21,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 19:47:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:21,684 INFO L225 Difference]: With dead ends: 140 [2020-10-27 19:47:21,684 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 19:47:21,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:47:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 19:47:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 108. [2020-10-27 19:47:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 19:47:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2020-10-27 19:47:21,699 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 33 [2020-10-27 19:47:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:21,699 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2020-10-27 19:47:21,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2020-10-27 19:47:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:47:21,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:21,700 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] [2020-10-27 19:47:21,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:47:21,700 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash -211259753, now seen corresponding path program 1 times [2020-10-27 19:47:21,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:21,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508339268] [2020-10-27 19:47:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:21,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:22,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:47:22,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-27 19:47:22,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:22,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:22,734 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-27 19:47:22,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:22,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:22,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:22,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:22,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:22,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:22,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:22,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:22,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:22,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:22,941 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 19:47:22,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508339268] [2020-10-27 19:47:22,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:22,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:22,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052114679] [2020-10-27 19:47:22,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:22,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:22,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:22,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:22,944 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand 14 states. [2020-10-27 19:47:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:24,333 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2020-10-27 19:47:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:24,333 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 19:47:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:24,335 INFO L225 Difference]: With dead ends: 140 [2020-10-27 19:47:24,335 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 19:47:24,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 19:47:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2020-10-27 19:47:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 19:47:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2020-10-27 19:47:24,352 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 33 [2020-10-27 19:47:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:24,352 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2020-10-27 19:47:24,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:24,352 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2020-10-27 19:47:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:47:24,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:24,353 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:47:24,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:47:24,354 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:24,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1252832661, now seen corresponding path program 4 times [2020-10-27 19:47:24,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:24,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105429031] [2020-10-27 19:47:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:24,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:24,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:26,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:47:26,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:26,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1902 [2020-10-27 19:47:26,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:26,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:26,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 19:47:26,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105429031] [2020-10-27 19:47:26,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:26,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:26,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732893084] [2020-10-27 19:47:26,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:26,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:26,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:26,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:26,816 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 12 states. [2020-10-27 19:47:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:27,608 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2020-10-27 19:47:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:47:27,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 19:47:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:27,610 INFO L225 Difference]: With dead ends: 157 [2020-10-27 19:47:27,610 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 19:47:27,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 19:47:27,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2020-10-27 19:47:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 19:47:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2020-10-27 19:47:27,628 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 33 [2020-10-27 19:47:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:27,628 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2020-10-27 19:47:27,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2020-10-27 19:47:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:47:27,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:27,629 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:27,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:47:27,629 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:27,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1428102660, now seen corresponding path program 3 times [2020-10-27 19:47:27,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:27,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205106109] [2020-10-27 19:47:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:27,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:28,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:47:28,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:28,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-27 19:47:28,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:28,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:29,252 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-27 19:47:29,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:29,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:29,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:29,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:29,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:47:29,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:29,451 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 19:47:29,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205106109] [2020-10-27 19:47:29,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:29,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:29,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556342282] [2020-10-27 19:47:29,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:29,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:29,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:29,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:29,453 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 14 states. [2020-10-27 19:47:29,640 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-27 19:47:30,136 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-27 19:47:30,465 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-27 19:47:30,657 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-27 19:47:30,928 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-27 19:47:31,265 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-27 19:47:31,591 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-27 19:47:31,796 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-27 19:47:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:32,547 INFO L93 Difference]: Finished difference Result 160 states and 189 transitions. [2020-10-27 19:47:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:47:32,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 19:47:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:32,550 INFO L225 Difference]: With dead ends: 160 [2020-10-27 19:47:32,550 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 19:47:32,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:47:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 19:47:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2020-10-27 19:47:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 19:47:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 138 transitions. [2020-10-27 19:47:32,570 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 138 transitions. Word has length 33 [2020-10-27 19:47:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:32,570 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 138 transitions. [2020-10-27 19:47:32,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 138 transitions. [2020-10-27 19:47:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:47:32,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:32,571 INFO L422 BasicCegarLoop]: trace histogram [4, 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 19:47:32,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:47:32,571 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1124493619, now seen corresponding path program 4 times [2020-10-27 19:47:32,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:32,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422718364] [2020-10-27 19:47:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:32,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:33,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:33,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:47:33,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:33,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-27 19:47:33,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:33,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:33,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:33,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:47:33,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:34,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:34,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:34,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:34,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422718364] [2020-10-27 19:47:34,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:34,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:34,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173227745] [2020-10-27 19:47:34,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:34,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:34,362 INFO L87 Difference]: Start difference. First operand 118 states and 138 transitions. Second operand 13 states. [2020-10-27 19:47:34,837 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 19:47:35,279 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-27 19:47:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:36,247 INFO L93 Difference]: Finished difference Result 155 states and 182 transitions. [2020-10-27 19:47:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:47:36,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 19:47:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:36,249 INFO L225 Difference]: With dead ends: 155 [2020-10-27 19:47:36,249 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 19:47:36,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:47:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 19:47:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-27 19:47:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 19:47:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2020-10-27 19:47:36,265 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 33 [2020-10-27 19:47:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:36,266 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2020-10-27 19:47:36,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2020-10-27 19:47:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:47:36,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:36,267 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:36,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:47:36,267 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1219313333, now seen corresponding path program 6 times [2020-10-27 19:47:36,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:36,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431152463] [2020-10-27 19:47:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:36,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:36,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:47:36,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:36,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-27 19:47:36,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:36,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:37,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:37,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:37,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:37,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:37,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:37,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:37,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:37,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:37,302 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 19:47:37,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431152463] [2020-10-27 19:47:37,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:37,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:37,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223770025] [2020-10-27 19:47:37,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:37,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:37,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:37,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:37,304 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand 14 states. [2020-10-27 19:47:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:39,350 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2020-10-27 19:47:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:47:39,351 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 19:47:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:39,353 INFO L225 Difference]: With dead ends: 178 [2020-10-27 19:47:39,353 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 19:47:39,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:47:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 19:47:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 121. [2020-10-27 19:47:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 19:47:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2020-10-27 19:47:39,371 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 33 [2020-10-27 19:47:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:39,371 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2020-10-27 19:47:39,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:39,371 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2020-10-27 19:47:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:47:39,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:39,372 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 19:47:39,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:47:39,372 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:39,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1022540085, now seen corresponding path program 1 times [2020-10-27 19:47:39,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:39,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417046361] [2020-10-27 19:47:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:39,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:41,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:47:41,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:47:41,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1819 [2020-10-27 19:47:41,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:41,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:41,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:41,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:41,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:41,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:41,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:41,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:41,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:41,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:41,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:41,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 19:47:41,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417046361] [2020-10-27 19:47:41,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:41,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:41,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174887685] [2020-10-27 19:47:41,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:41,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:41,518 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand 11 states. [2020-10-27 19:47:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:42,528 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2020-10-27 19:47:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:47:42,529 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 19:47:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:42,530 INFO L225 Difference]: With dead ends: 156 [2020-10-27 19:47:42,530 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 19:47:42,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:47:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 19:47:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 127. [2020-10-27 19:47:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 19:47:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2020-10-27 19:47:42,555 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 34 [2020-10-27 19:47:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:42,555 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2020-10-27 19:47:42,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2020-10-27 19:47:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:47:42,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:42,556 INFO L422 BasicCegarLoop]: trace histogram [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 19:47:42,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:47:42,556 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1672483772, now seen corresponding path program 2 times [2020-10-27 19:47:42,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:42,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719723062] [2020-10-27 19:47:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:42,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:42,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:42,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:47:42,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:42,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-27 19:47:42,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:47:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:47:42,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:42,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:42,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:42,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:42,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:42,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:42,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:42,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:42,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:42,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:42,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:47:42,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719723062] [2020-10-27 19:47:42,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:42,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:47:42,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089375791] [2020-10-27 19:47:42,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:47:42,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:42,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:47:42,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:42,994 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 8 states. [2020-10-27 19:47:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:43,455 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2020-10-27 19:47:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:47:43,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 19:47:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:43,457 INFO L225 Difference]: With dead ends: 151 [2020-10-27 19:47:43,457 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 19:47:43,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 19:47:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-27 19:47:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 19:47:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2020-10-27 19:47:43,478 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 34 [2020-10-27 19:47:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:43,478 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2020-10-27 19:47:43,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:47:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2020-10-27 19:47:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:47:43,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:43,479 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] [2020-10-27 19:47:43,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:47:43,480 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:43,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:43,480 INFO L82 PathProgramCache]: Analyzing trace with hash -930318253, now seen corresponding path program 5 times [2020-10-27 19:47:43,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:43,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625447434] [2020-10-27 19:47:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:43,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:43,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:43,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:47:43,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:43,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-27 19:47:43,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:47:43,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:44,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:44,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 19:47:44,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625447434] [2020-10-27 19:47:44,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:44,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:44,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975902535] [2020-10-27 19:47:44,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:44,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:44,106 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand 11 states. [2020-10-27 19:47:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:44,642 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2020-10-27 19:47:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:44,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 19:47:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:44,644 INFO L225 Difference]: With dead ends: 126 [2020-10-27 19:47:44,644 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 19:47:44,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:47:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 19:47:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-10-27 19:47:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 19:47:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-10-27 19:47:44,660 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 34 [2020-10-27 19:47:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:44,660 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-10-27 19:47:44,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-10-27 19:47:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:47:44,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:44,661 INFO L422 BasicCegarLoop]: trace histogram [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 19:47:44,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:47:44,661 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2141311388, now seen corresponding path program 5 times [2020-10-27 19:47:44,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:44,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878859877] [2020-10-27 19:47:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:44,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:45,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:45,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:47:45,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:45,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 990 [2020-10-27 19:47:45,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:45,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:47:45,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:45,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:47:45,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:45,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:45,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:45,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:45,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:45,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:45,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:45,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:45,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:45,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:45,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:45,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:45,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878859877] [2020-10-27 19:47:45,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:45,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152393782] [2020-10-27 19:47:45,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:45,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:45,857 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 10 states. [2020-10-27 19:47:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:46,740 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2020-10-27 19:47:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:46,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-27 19:47:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:46,743 INFO L225 Difference]: With dead ends: 132 [2020-10-27 19:47:46,743 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 19:47:46,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 19:47:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2020-10-27 19:47:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 19:47:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2020-10-27 19:47:46,764 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 34 [2020-10-27 19:47:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:46,764 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2020-10-27 19:47:46,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2020-10-27 19:47:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:47:46,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:46,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:46,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:47:46,765 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:46,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1130539435, now seen corresponding path program 7 times [2020-10-27 19:47:46,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:46,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665688642] [2020-10-27 19:47:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:46,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:47,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:47,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:47:47,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:47,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-27 19:47:47,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:47,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:47,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:47,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:47,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:47,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:47,993 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 19:47:47,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665688642] [2020-10-27 19:47:47,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:47,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:47,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163267474] [2020-10-27 19:47:47,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:47,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:47,995 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 14 states. [2020-10-27 19:47:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:49,677 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2020-10-27 19:47:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:47:49,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 19:47:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:49,680 INFO L225 Difference]: With dead ends: 142 [2020-10-27 19:47:49,680 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 19:47:49,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:47:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 19:47:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 109. [2020-10-27 19:47:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 19:47:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-10-27 19:47:49,702 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 34 [2020-10-27 19:47:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:49,703 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-10-27 19:47:49,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-10-27 19:47:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:47:49,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:49,704 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 19:47:49,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:47:49,704 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash 206228860, now seen corresponding path program 3 times [2020-10-27 19:47:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:49,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355662931] [2020-10-27 19:47:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:49,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:49,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:50,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:51,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:51,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:47:51,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:51,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-10-27 19:47:51,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:51,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:52,280 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-10-27 19:47:52,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:52,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:52,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:52,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:52,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:52,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:52,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:52,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:52,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:52,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:52,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:52,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355662931] [2020-10-27 19:47:52,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:52,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:52,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306091578] [2020-10-27 19:47:52,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:52,644 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 14 states. [2020-10-27 19:47:53,662 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-27 19:47:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:54,196 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2020-10-27 19:47:54,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:54,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 19:47:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:54,201 INFO L225 Difference]: With dead ends: 149 [2020-10-27 19:47:54,201 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 19:47:54,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 19:47:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2020-10-27 19:47:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 19:47:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2020-10-27 19:47:54,221 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 35 [2020-10-27 19:47:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:54,221 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2020-10-27 19:47:54,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2020-10-27 19:47:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:47:54,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:54,222 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-27 19:47:54,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:47:54,222 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash -17955760, now seen corresponding path program 4 times [2020-10-27 19:47:54,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:54,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368603884] [2020-10-27 19:47:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:54,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:54,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:54,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:47:54,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 19:47:54,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:47:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:54,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:54,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:54,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:54,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:54,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:54,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:54,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:54,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:54,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:54,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:54,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:54,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368603884] [2020-10-27 19:47:54,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:54,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:54,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465859666] [2020-10-27 19:47:54,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:54,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:54,930 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand 13 states. [2020-10-27 19:47:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:56,099 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2020-10-27 19:47:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:56,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 19:47:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:56,101 INFO L225 Difference]: With dead ends: 145 [2020-10-27 19:47:56,102 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 19:47:56,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:47:56,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 19:47:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2020-10-27 19:47:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 19:47:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2020-10-27 19:47:56,119 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 35 [2020-10-27 19:47:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:56,120 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2020-10-27 19:47:56,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:56,120 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2020-10-27 19:47:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:47:56,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:56,120 INFO L422 BasicCegarLoop]: trace histogram [4, 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 19:47:56,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:47:56,121 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1238187982, now seen corresponding path program 4 times [2020-10-27 19:47:56,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:56,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258460332] [2020-10-27 19:47:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:56,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:57,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:47:57,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:57,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-27 19:47:57,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:47:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:57,460 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-27 19:47:57,782 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-27 19:47:57,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:57,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:57,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:57,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:57,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:57,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:57,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:57,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:57,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:57,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:57,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258460332] [2020-10-27 19:47:57,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:57,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:47:57,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520995091] [2020-10-27 19:47:57,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:47:57,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:57,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:47:57,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:57,981 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand 15 states. [2020-10-27 19:47:58,741 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-27 19:47:58,993 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-27 19:47:59,398 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-27 19:47:59,716 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-10-27 19:48:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:00,223 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2020-10-27 19:48:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:48:00,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 19:48:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:00,225 INFO L225 Difference]: With dead ends: 151 [2020-10-27 19:48:00,225 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 19:48:00,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:48:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 19:48:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-27 19:48:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 19:48:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2020-10-27 19:48:00,251 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 35 [2020-10-27 19:48:00,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:00,252 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2020-10-27 19:48:00,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2020-10-27 19:48:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:48:00,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:00,253 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] [2020-10-27 19:48:00,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:48:00,253 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2015206406, now seen corresponding path program 5 times [2020-10-27 19:48:00,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:00,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020818291] [2020-10-27 19:48:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:00,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:02,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:05,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:05,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:48:05,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:48:05,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 19:48:05,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:48:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:05,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:48:05,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:05,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:05,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:05,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:05,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:05,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:05,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:05,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:05,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:05,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:05,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020818291] [2020-10-27 19:48:05,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:05,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:48:05,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073865773] [2020-10-27 19:48:05,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:48:05,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:48:05,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:05,784 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand 13 states. [2020-10-27 19:48:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:06,661 INFO L93 Difference]: Finished difference Result 150 states and 173 transitions. [2020-10-27 19:48:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:48:06,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 19:48:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:06,664 INFO L225 Difference]: With dead ends: 150 [2020-10-27 19:48:06,664 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 19:48:06,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:48:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 19:48:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2020-10-27 19:48:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:48:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2020-10-27 19:48:06,685 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 35 [2020-10-27 19:48:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:06,685 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2020-10-27 19:48:06,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:48:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2020-10-27 19:48:06,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:48:06,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:06,686 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:06,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:48:06,686 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1839936407, now seen corresponding path program 4 times [2020-10-27 19:48:06,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:06,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145612238] [2020-10-27 19:48:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:06,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:08,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:08,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:48:08,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:08,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-27 19:48:08,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:08,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:48:08,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:08,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:48:08,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:08,902 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-27 19:48:09,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:09,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:09,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:09,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:09,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:09,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:09,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:09,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:09,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:09,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:09,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:09,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145612238] [2020-10-27 19:48:09,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:09,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:09,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68358681] [2020-10-27 19:48:09,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:09,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:09,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:09,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:09,112 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand 15 states. [2020-10-27 19:48:10,694 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2020-10-27 19:48:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:11,128 INFO L93 Difference]: Finished difference Result 175 states and 205 transitions. [2020-10-27 19:48:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:48:11,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 19:48:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:11,130 INFO L225 Difference]: With dead ends: 175 [2020-10-27 19:48:11,130 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 19:48:11,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:48:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 19:48:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 129. [2020-10-27 19:48:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 19:48:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2020-10-27 19:48:11,163 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 35 [2020-10-27 19:48:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:11,163 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2020-10-27 19:48:11,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2020-10-27 19:48:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:48:11,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:11,164 INFO L422 BasicCegarLoop]: trace histogram [5, 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 19:48:11,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 19:48:11,164 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2143545448, now seen corresponding path program 6 times [2020-10-27 19:48:11,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:11,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879391880] [2020-10-27 19:48:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:12,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:12,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:48:12,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:12,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-27 19:48:12,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:48:12,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:12,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:12,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:12,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:12,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:12,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:12,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:12,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:12,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:12,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:48:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879391880] [2020-10-27 19:48:12,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:12,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:48:12,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205669970] [2020-10-27 19:48:12,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:48:12,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:48:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:12,869 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand 13 states. [2020-10-27 19:48:13,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:13,679 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2020-10-27 19:48:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:48:13,680 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 19:48:13,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:13,681 INFO L225 Difference]: With dead ends: 158 [2020-10-27 19:48:13,682 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 19:48:13,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:48:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 19:48:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 131. [2020-10-27 19:48:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 19:48:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2020-10-27 19:48:13,702 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 35 [2020-10-27 19:48:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:13,702 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2020-10-27 19:48:13,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:48:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2020-10-27 19:48:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:48:13,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:13,703 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] [2020-10-27 19:48:13,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 19:48:13,703 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash 464227785, now seen corresponding path program 5 times [2020-10-27 19:48:13,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:13,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887682038] [2020-10-27 19:48:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:13,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:14,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:14,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:48:14,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:14,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-27 19:48:14,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:14,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:48:14,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:14,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:48:14,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,156 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-27 19:48:15,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:15,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:15,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:15,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:15,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:15,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:48:15,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:15,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:15,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:15,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:15,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:15,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887682038] [2020-10-27 19:48:15,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:15,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:15,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465694222] [2020-10-27 19:48:15,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:15,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:15,415 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand 15 states. [2020-10-27 19:48:16,497 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-27 19:48:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:17,171 INFO L93 Difference]: Finished difference Result 169 states and 197 transitions. [2020-10-27 19:48:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:48:17,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 19:48:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:17,173 INFO L225 Difference]: With dead ends: 169 [2020-10-27 19:48:17,173 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 19:48:17,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 19:48:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2020-10-27 19:48:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 19:48:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2020-10-27 19:48:17,198 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 36 [2020-10-27 19:48:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:17,198 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2020-10-27 19:48:17,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2020-10-27 19:48:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:48:17,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:17,199 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:48:17,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 19:48:17,200 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:17,200 INFO L82 PathProgramCache]: Analyzing trace with hash 383651881, now seen corresponding path program 7 times [2020-10-27 19:48:17,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:17,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896947944] [2020-10-27 19:48:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:17,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:17,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:19,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:19,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:48:19,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:48:19,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2749 [2020-10-27 19:48:19,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:48:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:48:19,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:20,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:20,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:20,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:20,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:20,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:20,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:20,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:20,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:20,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:20,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:20,613 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 19:48:20,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896947944] [2020-10-27 19:48:20,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:20,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122930163] [2020-10-27 19:48:20,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:20,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:20,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:20,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:20,615 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand 15 states. [2020-10-27 19:48:22,188 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-27 19:48:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:22,743 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2020-10-27 19:48:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:48:22,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 19:48:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:22,745 INFO L225 Difference]: With dead ends: 181 [2020-10-27 19:48:22,746 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 19:48:22,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:48:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 19:48:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 138. [2020-10-27 19:48:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:48:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-10-27 19:48:22,770 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 36 [2020-10-27 19:48:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:22,770 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-10-27 19:48:22,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-10-27 19:48:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:48:22,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:22,771 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:22,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 19:48:22,771 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1394423834, now seen corresponding path program 8 times [2020-10-27 19:48:22,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:22,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8462232] [2020-10-27 19:48:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:22,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:23,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:23,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:48:23,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:23,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-27 19:48:23,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:23,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:48:23,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:23,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:48:23,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:24,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:24,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:24,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:24,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:24,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:24,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:48:24,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:24,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:24,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:24,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:24,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:24,076 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 19:48:24,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8462232] [2020-10-27 19:48:24,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:24,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:24,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207420020] [2020-10-27 19:48:24,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:24,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:24,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:24,078 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand 15 states. [2020-10-27 19:48:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:26,662 INFO L93 Difference]: Finished difference Result 209 states and 246 transitions. [2020-10-27 19:48:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:48:26,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 19:48:26,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:26,665 INFO L225 Difference]: With dead ends: 209 [2020-10-27 19:48:26,665 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 19:48:26,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:48:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 19:48:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 138. [2020-10-27 19:48:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:48:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-10-27 19:48:26,699 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 36 [2020-10-27 19:48:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:26,699 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-10-27 19:48:26,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-10-27 19:48:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:48:26,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:26,700 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] [2020-10-27 19:48:26,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 19:48:26,701 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1980827425, now seen corresponding path program 5 times [2020-10-27 19:48:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:26,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282036542] [2020-10-27 19:48:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:26,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:27,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:27,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:48:27,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:27,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-27 19:48:27,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:48:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:48:27,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:27,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:27,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:27,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:27,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:27,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:27,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:27,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:27,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:48:27,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282036542] [2020-10-27 19:48:27,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:27,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:48:27,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603136469] [2020-10-27 19:48:27,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:48:27,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:27,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:48:27,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:27,575 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand 13 states. [2020-10-27 19:48:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:28,531 INFO L93 Difference]: Finished difference Result 160 states and 184 transitions. [2020-10-27 19:48:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:48:28,532 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-27 19:48:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:28,533 INFO L225 Difference]: With dead ends: 160 [2020-10-27 19:48:28,533 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 19:48:28,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:48:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 19:48:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2020-10-27 19:48:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 19:48:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2020-10-27 19:48:28,562 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 37 [2020-10-27 19:48:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:28,562 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2020-10-27 19:48:28,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:48:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2020-10-27 19:48:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:48:28,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:28,563 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-27 19:48:28,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 19:48:28,563 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1287772405, now seen corresponding path program 5 times [2020-10-27 19:48:28,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:28,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674196524] [2020-10-27 19:48:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:28,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:28,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:48:28,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:28,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-27 19:48:28,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:28,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:28,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:28,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:48:28,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:29,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:29,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:29,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:29,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:29,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:29,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:29,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674196524] [2020-10-27 19:48:29,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:29,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:29,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704633503] [2020-10-27 19:48:29,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:29,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:29,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:29,366 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand 14 states. [2020-10-27 19:48:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:30,349 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2020-10-27 19:48:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:48:30,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 19:48:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:30,352 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:48:30,352 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 19:48:30,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 19:48:30,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 135. [2020-10-27 19:48:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 19:48:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2020-10-27 19:48:30,380 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 37 [2020-10-27 19:48:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:30,381 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2020-10-27 19:48:30,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2020-10-27 19:48:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:48:30,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:30,381 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:48:30,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 19:48:30,382 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:30,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:30,382 INFO L82 PathProgramCache]: Analyzing trace with hash 769834290, now seen corresponding path program 8 times [2020-10-27 19:48:30,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:30,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151408667] [2020-10-27 19:48:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:30,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:32,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:32,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:48:32,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:48:32,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-27 19:48:32,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:48:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:48:32,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:33,408 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-27 19:48:33,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:33,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:33,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:33,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:33,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:33,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:33,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:33,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:33,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:33,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:33,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:33,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151408667] [2020-10-27 19:48:33,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:33,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:48:33,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491977132] [2020-10-27 19:48:33,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:48:33,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:33,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:48:33,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:33,836 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand 17 states. [2020-10-27 19:48:34,428 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-27 19:48:34,993 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-27 19:48:36,025 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-27 19:48:36,195 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-27 19:48:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:36,266 INFO L93 Difference]: Finished difference Result 177 states and 207 transitions. [2020-10-27 19:48:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:48:36,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-27 19:48:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:36,269 INFO L225 Difference]: With dead ends: 177 [2020-10-27 19:48:36,269 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 19:48:36,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:48:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 19:48:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2020-10-27 19:48:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:48:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2020-10-27 19:48:36,309 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 37 [2020-10-27 19:48:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:36,310 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2020-10-27 19:48:36,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:48:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2020-10-27 19:48:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:48:36,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:36,311 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:36,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 19:48:36,311 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:36,311 INFO L82 PathProgramCache]: Analyzing trace with hash 357764816, now seen corresponding path program 9 times [2020-10-27 19:48:36,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:36,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702578654] [2020-10-27 19:48:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:36,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:36,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:36,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:48:36,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:36,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-27 19:48:36,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:48:36,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:37,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:37,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:37,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:37,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:37,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:37,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:37,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:37,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:37,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:37,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:37,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:37,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702578654] [2020-10-27 19:48:37,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:37,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:37,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183410111] [2020-10-27 19:48:37,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:37,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:37,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:37,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:37,217 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand 14 states. [2020-10-27 19:48:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:39,374 INFO L93 Difference]: Finished difference Result 193 states and 223 transitions. [2020-10-27 19:48:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:48:39,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 19:48:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:39,376 INFO L225 Difference]: With dead ends: 193 [2020-10-27 19:48:39,376 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 19:48:39,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:48:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 19:48:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2020-10-27 19:48:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:48:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-10-27 19:48:39,409 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 37 [2020-10-27 19:48:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:39,410 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-10-27 19:48:39,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-10-27 19:48:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:48:39,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:39,411 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] [2020-10-27 19:48:39,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 19:48:39,411 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:39,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1170678871, now seen corresponding path program 6 times [2020-10-27 19:48:39,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:39,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920727046] [2020-10-27 19:48:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:39,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:39,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:42,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:42,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:48:42,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2965 [2020-10-27 19:48:42,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:48:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:42,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:42,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:42,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:42,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:42,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:42,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:48:42,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:42,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:42,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:42,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920727046] [2020-10-27 19:48:42,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:42,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:42,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799305612] [2020-10-27 19:48:42,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:42,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:42,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:42,983 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand 14 states. [2020-10-27 19:48:44,266 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-27 19:48:44,517 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-27 19:48:44,798 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-27 19:48:44,945 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 19:48:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:45,092 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2020-10-27 19:48:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:48:45,093 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 19:48:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:45,095 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:48:45,095 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 19:48:45,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:48:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 19:48:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2020-10-27 19:48:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:48:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2020-10-27 19:48:45,124 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 37 [2020-10-27 19:48:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:45,124 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2020-10-27 19:48:45,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2020-10-27 19:48:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:48:45,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:45,125 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] [2020-10-27 19:48:45,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 19:48:45,125 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash 946494251, now seen corresponding path program 6 times [2020-10-27 19:48:45,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:45,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656255440] [2020-10-27 19:48:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:45,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:45,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:46,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:48:46,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:46,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1711 [2020-10-27 19:48:46,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:48:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:48:46,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:47,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:47,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:47,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:47,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:47,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:47,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:47,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:48:47,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656255440] [2020-10-27 19:48:47,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:47,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:48:47,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586852682] [2020-10-27 19:48:47,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:48:47,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:47,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:48:47,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:48:47,056 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand 11 states. [2020-10-27 19:48:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:47,848 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-10-27 19:48:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:48:47,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-27 19:48:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:47,850 INFO L225 Difference]: With dead ends: 177 [2020-10-27 19:48:47,851 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 19:48:47,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 19:48:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2020-10-27 19:48:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:48:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-10-27 19:48:47,881 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 37 [2020-10-27 19:48:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:47,882 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-10-27 19:48:47,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:48:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-10-27 19:48:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:48:47,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:47,883 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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 19:48:47,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 19:48:47,883 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:47,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:47,883 INFO L82 PathProgramCache]: Analyzing trace with hash -273737971, now seen corresponding path program 7 times [2020-10-27 19:48:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:47,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978024068] [2020-10-27 19:48:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:47,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:49,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:49,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:48:49,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:49,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1406 [2020-10-27 19:48:49,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:48:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:49,740 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-27 19:48:50,677 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 62 [2020-10-27 19:48:50,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:50,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:50,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:50,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:50,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:50,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:50,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:50,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:50,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:50,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:50,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:50,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978024068] [2020-10-27 19:48:50,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:50,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:50,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986516861] [2020-10-27 19:48:50,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:50,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:50,872 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 16 states. [2020-10-27 19:48:52,241 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-27 19:48:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:52,638 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2020-10-27 19:48:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:48:52,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 19:48:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:52,640 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:48:52,640 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 19:48:52,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 19:48:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2020-10-27 19:48:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 19:48:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2020-10-27 19:48:52,667 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 37 [2020-10-27 19:48:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:52,667 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2020-10-27 19:48:52,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2020-10-27 19:48:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:48:52,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:52,668 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:52,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 19:48:52,668 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:52,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:52,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1490580878, now seen corresponding path program 6 times [2020-10-27 19:48:52,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:52,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344753841] [2020-10-27 19:48:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:52,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:54,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:54,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:48:54,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:54,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-10-27 19:48:54,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:54,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:48:54,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:54,820 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 19:48:55,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:55,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:55,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:55,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:55,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:55,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:55,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:55,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:55,353 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 19:48:55,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344753841] [2020-10-27 19:48:55,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:55,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:55,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45953401] [2020-10-27 19:48:55,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:55,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:55,355 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand 16 states. [2020-10-27 19:48:56,549 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-27 19:48:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:57,002 INFO L93 Difference]: Finished difference Result 178 states and 202 transitions. [2020-10-27 19:48:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:48:57,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 19:48:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:57,004 INFO L225 Difference]: With dead ends: 178 [2020-10-27 19:48:57,004 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 19:48:57,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 19:48:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 135. [2020-10-27 19:48:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 19:48:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2020-10-27 19:48:57,040 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 37 [2020-10-27 19:48:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:57,041 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2020-10-27 19:48:57,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2020-10-27 19:48:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:48:57,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:57,042 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:48:57,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 19:48:57,042 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:57,042 INFO L82 PathProgramCache]: Analyzing trace with hash 33247042, now seen corresponding path program 7 times [2020-10-27 19:48:57,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:57,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398619872] [2020-10-27 19:48:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:57,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:57,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:58,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:58,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:48:58,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:58,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1687 [2020-10-27 19:48:58,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:58,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:58,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:58,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:48:58,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:59,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:59,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:59,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:59,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398619872] [2020-10-27 19:48:59,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:59,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:59,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688356996] [2020-10-27 19:48:59,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:59,156 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand 14 states. [2020-10-27 19:49:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:00,304 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2020-10-27 19:49:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:49:00,305 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 19:49:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:00,306 INFO L225 Difference]: With dead ends: 168 [2020-10-27 19:49:00,307 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 19:49:00,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:49:00,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 19:49:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2020-10-27 19:49:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 19:49:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-10-27 19:49:00,340 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 38 [2020-10-27 19:49:00,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:00,340 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-10-27 19:49:00,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:49:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-10-27 19:49:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:49:00,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:00,341 INFO L422 BasicCegarLoop]: trace histogram [4, 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 19:49:00,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 19:49:00,341 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1740471251, now seen corresponding path program 1 times [2020-10-27 19:49:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:00,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237964079] [2020-10-27 19:49:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:00,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:01,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:01,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:49:01,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:01,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-27 19:49:01,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:01,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:49:01,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:01,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:49:01,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:01,777 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-27 19:49:02,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:02,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:02,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:02,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:02,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:02,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:02,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:02,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:02,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:02,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:02,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:02,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237964079] [2020-10-27 19:49:02,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:02,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:49:02,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888298564] [2020-10-27 19:49:02,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:49:02,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:49:02,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:02,206 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 16 states. [2020-10-27 19:49:03,507 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-27 19:49:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:04,001 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2020-10-27 19:49:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:49:04,002 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 19:49:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:04,004 INFO L225 Difference]: With dead ends: 170 [2020-10-27 19:49:04,004 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 19:49:04,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:49:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 19:49:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2020-10-27 19:49:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:49:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-10-27 19:49:04,031 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 38 [2020-10-27 19:49:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:04,031 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-10-27 19:49:04,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:49:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-10-27 19:49:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:49:04,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:04,032 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:49:04,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 19:49:04,032 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash 685658766, now seen corresponding path program 8 times [2020-10-27 19:49:04,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:04,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676853181] [2020-10-27 19:49:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:04,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:04,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:04,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:49:04,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:04,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-27 19:49:04,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:04,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:49:04,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:04,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:49:04,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:05,340 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-27 19:49:05,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:05,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:05,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:05,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:05,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:05,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:05,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:05,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:05,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:05,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:05,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676853181] [2020-10-27 19:49:05,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:05,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:49:05,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128211790] [2020-10-27 19:49:05,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:49:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:49:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:49:05,828 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 15 states. [2020-10-27 19:49:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:07,494 INFO L93 Difference]: Finished difference Result 174 states and 202 transitions. [2020-10-27 19:49:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:49:07,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 19:49:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:07,496 INFO L225 Difference]: With dead ends: 174 [2020-10-27 19:49:07,496 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 19:49:07,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:49:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 19:49:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 140. [2020-10-27 19:49:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 19:49:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-10-27 19:49:07,530 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 38 [2020-10-27 19:49:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:07,530 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-10-27 19:49:07,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:49:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-10-27 19:49:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:49:07,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:07,531 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:49:07,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 19:49:07,531 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash -355914142, now seen corresponding path program 6 times [2020-10-27 19:49:07,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:07,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164610630] [2020-10-27 19:49:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:07,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:08,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:10,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:10,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:49:10,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:49:10,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2682 [2020-10-27 19:49:10,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:49:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:49:10,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:10,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:10,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:10,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:10,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:10,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:10,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:10,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:10,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 19:49:10,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164610630] [2020-10-27 19:49:10,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:10,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:49:10,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450446848] [2020-10-27 19:49:10,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:49:10,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:10,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:49:10,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:49:10,883 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 13 states. [2020-10-27 19:49:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:11,780 INFO L93 Difference]: Finished difference Result 186 states and 213 transitions. [2020-10-27 19:49:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:49:11,781 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 19:49:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:11,782 INFO L225 Difference]: With dead ends: 186 [2020-10-27 19:49:11,782 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 19:49:11,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:49:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 19:49:11,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2020-10-27 19:49:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 19:49:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2020-10-27 19:49:11,809 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 38 [2020-10-27 19:49:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:11,809 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2020-10-27 19:49:11,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:49:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2020-10-27 19:49:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:49:11,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:11,810 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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 19:49:11,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 19:49:11,810 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:11,811 INFO L82 PathProgramCache]: Analyzing trace with hash 297407054, now seen corresponding path program 7 times [2020-10-27 19:49:11,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:11,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554727641] [2020-10-27 19:49:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:11,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:13,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:13,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:49:13,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:13,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-10-27 19:49:13,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:13,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:49:13,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:13,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:49:13,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:14,019 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-27 19:49:14,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:14,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:14,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:14,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:14,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:14,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:49:14,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:14,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:14,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:14,277 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 19:49:14,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554727641] [2020-10-27 19:49:14,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:14,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:49:14,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865385395] [2020-10-27 19:49:14,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:49:14,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:49:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:14,278 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand 16 states. [2020-10-27 19:49:14,468 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-27 19:49:15,362 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-27 19:49:15,692 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-27 19:49:15,900 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-10-27 19:49:16,233 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-27 19:49:16,653 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-27 19:49:17,025 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 83 [2020-10-27 19:49:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:18,097 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2020-10-27 19:49:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:49:18,098 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 19:49:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:18,100 INFO L225 Difference]: With dead ends: 204 [2020-10-27 19:49:18,101 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 19:49:18,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:49:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 19:49:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 138. [2020-10-27 19:49:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:49:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2020-10-27 19:49:18,141 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 38 [2020-10-27 19:49:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:18,141 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2020-10-27 19:49:18,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:49:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2020-10-27 19:49:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:49:18,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:18,143 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-27 19:49:18,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 19:49:18,143 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:18,143 INFO L82 PathProgramCache]: Analyzing trace with hash 216831150, now seen corresponding path program 9 times [2020-10-27 19:49:18,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:18,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228694925] [2020-10-27 19:49:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:18,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:22,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:22,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:49:22,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:22,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4061 [2020-10-27 19:49:22,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:22,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:49:22,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:22,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:49:22,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:22,890 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 39 [2020-10-27 19:49:23,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:23,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:23,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:23,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:23,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:49:23,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:23,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:23,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:23,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:23,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:23,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228694925] [2020-10-27 19:49:23,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:23,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:49:23,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480496019] [2020-10-27 19:49:23,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:49:23,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:23,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:49:23,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:23,241 INFO L87 Difference]: Start difference. First operand 138 states and 159 transitions. Second operand 16 states. [2020-10-27 19:49:24,900 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-27 19:49:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:25,373 INFO L93 Difference]: Finished difference Result 187 states and 218 transitions. [2020-10-27 19:49:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:49:25,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 19:49:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:25,376 INFO L225 Difference]: With dead ends: 187 [2020-10-27 19:49:25,376 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 19:49:25,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:49:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 19:49:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-27 19:49:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:49:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2020-10-27 19:49:25,413 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 38 [2020-10-27 19:49:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:25,414 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2020-10-27 19:49:25,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:49:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2020-10-27 19:49:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:49:25,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:25,414 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:25,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 19:49:25,415 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1227603103, now seen corresponding path program 10 times [2020-10-27 19:49:25,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:25,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672225327] [2020-10-27 19:49:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:26,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:26,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:49:26,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:26,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-10-27 19:49:26,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:26,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:49:26,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:26,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:49:26,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:27,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:27,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:27,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:27,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:27,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:27,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:49:27,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:27,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:27,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:27,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672225327] [2020-10-27 19:49:27,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:27,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:49:27,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429179212] [2020-10-27 19:49:27,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:49:27,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:27,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:49:27,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:27,197 INFO L87 Difference]: Start difference. First operand 138 states and 159 transitions. Second operand 16 states. [2020-10-27 19:49:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:30,066 INFO L93 Difference]: Finished difference Result 198 states and 231 transitions. [2020-10-27 19:49:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:49:30,067 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 19:49:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:30,069 INFO L225 Difference]: With dead ends: 198 [2020-10-27 19:49:30,069 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 19:49:30,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:49:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 19:49:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 138. [2020-10-27 19:49:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 19:49:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2020-10-27 19:49:30,111 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 38 [2020-10-27 19:49:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:30,112 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2020-10-27 19:49:30,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:49:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2020-10-27 19:49:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:49:30,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:30,113 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] [2020-10-27 19:49:30,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 19:49:30,113 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1962088538, now seen corresponding path program 8 times [2020-10-27 19:49:30,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:30,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875308434] [2020-10-27 19:49:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:49:30,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:30,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:30,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:30,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:30,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:30,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:30,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:30,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:30,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:30,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:30,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875308434] [2020-10-27 19:49:30,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:30,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:49:30,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986866095] [2020-10-27 19:49:30,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:49:30,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:30,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:49:30,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:49:30,940 INFO L87 Difference]: Start difference. First operand 138 states and 159 transitions. Second operand 14 states. [2020-10-27 19:49:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:31,813 INFO L93 Difference]: Finished difference Result 159 states and 184 transitions. [2020-10-27 19:49:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:49:31,814 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 19:49:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:31,815 INFO L225 Difference]: With dead ends: 159 [2020-10-27 19:49:31,815 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 19:49:31,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:49:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 19:49:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 131. [2020-10-27 19:49:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 19:49:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2020-10-27 19:49:31,854 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 39 [2020-10-27 19:49:31,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:31,855 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2020-10-27 19:49:31,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:49:31,855 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2020-10-27 19:49:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:49:31,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:31,855 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:49:31,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 19:49:31,856 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:31,856 INFO L82 PathProgramCache]: Analyzing trace with hash 839822920, now seen corresponding path program 2 times [2020-10-27 19:49:31,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:31,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376369760] [2020-10-27 19:49:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:31,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:32,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:32,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:35,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:35,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:49:35,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:49:35,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3845 [2020-10-27 19:49:35,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:35,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:49:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:49:35,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:35,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:35,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:35,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:35,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:35,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:35,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:35,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:35,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:35,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:35,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:35,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:49:35,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376369760] [2020-10-27 19:49:35,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:35,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:49:35,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174386418] [2020-10-27 19:49:35,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:49:35,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:49:35,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:49:35,889 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand 10 states. [2020-10-27 19:49:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:36,630 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2020-10-27 19:49:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:49:36,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 19:49:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:36,632 INFO L225 Difference]: With dead ends: 163 [2020-10-27 19:49:36,632 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 19:49:36,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 19:49:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-27 19:49:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 19:49:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-10-27 19:49:36,666 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 39 [2020-10-27 19:49:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:36,666 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-10-27 19:49:36,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:49:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-10-27 19:49:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:49:36,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:36,667 INFO L422 BasicCegarLoop]: trace histogram [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 19:49:36,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 19:49:36,667 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash -860212516, now seen corresponding path program 8 times [2020-10-27 19:49:36,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:36,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522230344] [2020-10-27 19:49:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:36,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:37,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:37,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:49:37,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:37,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-27 19:49:37,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:37,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:49:37,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:37,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:49:37,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:38,046 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-27 19:49:38,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:38,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:38,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:38,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:38,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:38,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:38,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:38,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:38,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:38,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:38,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522230344] [2020-10-27 19:49:38,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:38,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:49:38,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178741096] [2020-10-27 19:49:38,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:49:38,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:38,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:49:38,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:49:38,298 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 15 states. [2020-10-27 19:49:39,483 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-27 19:49:40,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:40,532 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2020-10-27 19:49:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:49:40,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 19:49:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:40,534 INFO L225 Difference]: With dead ends: 161 [2020-10-27 19:49:40,534 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 19:49:40,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:49:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 19:49:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2020-10-27 19:49:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 19:49:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2020-10-27 19:49:40,566 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 39 [2020-10-27 19:49:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:40,567 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2020-10-27 19:49:40,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:49:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2020-10-27 19:49:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:49:40,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:40,567 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:49:40,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 19:49:40,568 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash -410250116, now seen corresponding path program 1 times [2020-10-27 19:49:40,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:40,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757769054] [2020-10-27 19:49:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:49:41,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:42,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:42,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:42,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:42,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:42,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:42,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:42,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:42,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:42,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:42,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:49:42,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757769054] [2020-10-27 19:49:42,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:42,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:49:42,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807834007] [2020-10-27 19:49:42,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:49:42,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:49:42,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:49:42,131 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand 14 states. [2020-10-27 19:49:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:43,211 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2020-10-27 19:49:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:49:43,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 19:49:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:43,213 INFO L225 Difference]: With dead ends: 140 [2020-10-27 19:49:43,213 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 19:49:43,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:49:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states.