/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:11:40,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:11:40,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:11:40,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:11:40,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:11:40,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:11:40,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:11:40,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:11:40,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:11:40,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:11:40,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:11:40,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:11:40,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:11:40,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:11:40,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:11:40,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:11:40,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:11:40,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:11:40,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:11:40,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:11:40,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:11:40,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:11:40,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:11:40,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:11:40,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:11:40,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:11:40,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:11:40,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:11:40,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:11:40,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:11:40,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:11:40,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:11:40,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:11:40,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:11:40,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:11:40,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:11:40,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:11:40,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:11:40,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:11:40,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:11:40,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:11:40,478 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 [2020-10-29 09:11:40,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:11:40,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:11:40,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:11:40,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:11:40,508 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:11:40,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:11:40,509 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:11:40,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:11:40,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:11:40,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:11:40,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:11:40,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:11:40,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:11:40,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:11:40,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:11:40,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:11:40,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:11:40,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:11:40,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:11:40,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:11:40,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:11:40,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:11:40,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:11:40,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:11:40,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:11:40,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:11:40,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:11:40,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:11:40,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:11:40,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:11:40,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:11:40,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:11:40,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:11:40,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:11:40,971 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:11:40,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i [2020-10-29 09:11:41,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/771f251c0/28ef0b3108cd446580257a5d4077eb8a/FLAGba0c271fa [2020-10-29 09:11:41,855 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:11:41,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-1.i [2020-10-29 09:11:41,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/771f251c0/28ef0b3108cd446580257a5d4077eb8a/FLAGba0c271fa [2020-10-29 09:11:42,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/771f251c0/28ef0b3108cd446580257a5d4077eb8a [2020-10-29 09:11:42,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:11:42,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:11:42,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:11:42,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:11:42,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:11:42,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f95449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42, skipping insertion in model container [2020-10-29 09:11:42,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:11:42,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:11:42,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:11:42,667 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:11:42,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:11:42,834 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:11:42,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42 WrapperNode [2020-10-29 09:11:42,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:11:42,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:11:42,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:11:42,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:11:42,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (1/1) ... [2020-10-29 09:11:42,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:11:42,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:11:42,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:11:42,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:11:42,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (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 [2020-10-29 09:11:43,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:11:43,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:11:43,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:11:43,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:11:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:11:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:11:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:11:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:11:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:11:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:11:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:11:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:11:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:11:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:11:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:11:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:11:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:11:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:11:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:11:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:11:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:11:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:11:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:11:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:11:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:11:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:11:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:11:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:11:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:11:43,033 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:11:43,033 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:11:43,033 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:11:43,034 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:11:43,034 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:11:43,034 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:11:43,034 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:11:43,034 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:11:43,034 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:11:43,035 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:11:43,035 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:11:43,035 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:11:43,035 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:11:43,035 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:11:43,035 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:11:43,035 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:11:43,036 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:11:43,036 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:11:43,036 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:11:43,036 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:11:43,036 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:11:43,036 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:11:43,036 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:11:43,037 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:11:43,038 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:11:43,038 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:11:43,039 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:11:43,039 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:11:43,039 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:11:43,039 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:11:43,040 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:11:43,040 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:11:43,040 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:11:43,040 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:11:43,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:11:43,040 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:11:43,040 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:11:43,041 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:11:43,041 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:11:43,041 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:11:43,041 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:11:43,041 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:11:43,042 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:11:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:11:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:11:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:11:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:11:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:11:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:11:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:11:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:11:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:11:43,045 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:11:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:11:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:11:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:11:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:11:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:11:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:11:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:11:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:11:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:11:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:11:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:11:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:11:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:11:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:11:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:11:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:11:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:11:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:11:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:11:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:11:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:11:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:11:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:11:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:11:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:11:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:11:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:11:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:11:43,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:11:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:11:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:11:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:11:43,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:11:43,622 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:11:43,622 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-29 09:11:43,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:11:43 BoogieIcfgContainer [2020-10-29 09:11:43,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:11:43,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:11:43,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:11:43,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:11:43,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:11:42" (1/3) ... [2020-10-29 09:11:43,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b376d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:11:43, skipping insertion in model container [2020-10-29 09:11:43,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:11:42" (2/3) ... [2020-10-29 09:11:43,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b376d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:11:43, skipping insertion in model container [2020-10-29 09:11:43,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:11:43" (3/3) ... [2020-10-29 09:11:43,633 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-1.i [2020-10-29 09:11:43,645 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:11:43,650 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:11:43,664 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:11:43,691 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:11:43,692 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:11:43,692 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:11:43,692 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:11:43,692 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:11:43,692 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:11:43,692 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:11:43,692 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:11:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-29 09:11:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:11:43,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:43,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:43,719 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash -630579744, now seen corresponding path program 1 times [2020-10-29 09:11:43,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:43,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569450061] [2020-10-29 09:11:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:44,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-29 09:11:44,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:44,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-29 09:11:44,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:44,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:11:44,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:11:44,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:11:44,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:44,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:44,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:44,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 09:11:44,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:44,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:44,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:44,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569450061] [2020-10-29 09:11:44,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:44,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:11:44,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103831249] [2020-10-29 09:11:44,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:11:44,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:44,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:11:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:11:44,561 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 5 states. [2020-10-29 09:11:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:44,789 INFO L93 Difference]: Finished difference Result 78 states and 131 transitions. [2020-10-29 09:11:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:11:44,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-29 09:11:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:44,800 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:11:44,800 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:11:44,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:11:44,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:11:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-29 09:11:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:11:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-29 09:11:44,856 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 12 [2020-10-29 09:11:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:44,857 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-29 09:11:44,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:11:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-29 09:11:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:11:44,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:44,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:44,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:11:44,859 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:44,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1882684930, now seen corresponding path program 1 times [2020-10-29 09:11:44,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:44,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243862324] [2020-10-29 09:11:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:44,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:45,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:11:45,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:45,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-29 09:11:45,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:45,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:11:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:11:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:45,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:45,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:45,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:45,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:45,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:11:45,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:45,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:45,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:45,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:45,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:45,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:45,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243862324] [2020-10-29 09:11:45,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:45,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:11:45,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133778661] [2020-10-29 09:11:45,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:11:45,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:11:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:11:45,135 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-29 09:11:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:45,325 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-29 09:11:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:45,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-29 09:11:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:45,327 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:11:45,327 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:11:45,329 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 [2020-10-29 09:11:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:11:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-10-29 09:11:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:11:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:11:45,339 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2020-10-29 09:11:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:45,339 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:11:45,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:11:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:11:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:11:45,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:45,341 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:45,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:11:45,341 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash -922245935, now seen corresponding path program 1 times [2020-10-29 09:11:45,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:45,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785547476] [2020-10-29 09:11:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:45,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:45,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:11:45,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-29 09:11:45,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:45,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:11:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:11:45,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:45,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:45,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:45,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:45,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:45,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:45,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:45,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:45,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:45,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:45,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:45,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:45,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785547476] [2020-10-29 09:11:45,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:45,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:45,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245761993] [2020-10-29 09:11:45,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:45,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:45,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:45,941 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 8 states. [2020-10-29 09:11:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:46,336 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-10-29 09:11:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:11:46,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-29 09:11:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:46,338 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:11:46,338 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:11:46,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:11:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2020-10-29 09:11:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:11:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-29 09:11:46,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 19 [2020-10-29 09:11:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:46,348 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-29 09:11:46,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-29 09:11:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:11:46,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:46,349 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:46,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:11:46,350 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash -221181357, now seen corresponding path program 1 times [2020-10-29 09:11:46,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:46,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102261640] [2020-10-29 09:11:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:46,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:46,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:11:46,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:46,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-29 09:11:46,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:46,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:11:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:46,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:11:46,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:46,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:46,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:46,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:46,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:46,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:46,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:46,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:46,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:46,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:46,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102261640] [2020-10-29 09:11:46,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:46,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:46,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537512517] [2020-10-29 09:11:46,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:46,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:46,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:46,799 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 8 states. [2020-10-29 09:11:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:47,080 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-29 09:11:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:11:47,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-29 09:11:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:47,081 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:11:47,081 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:11:47,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:11:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2020-10-29 09:11:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:11:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-29 09:11:47,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-29 09:11:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:47,089 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-29 09:11:47,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:47,089 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-29 09:11:47,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:11:47,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:47,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:47,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:11:47,090 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:47,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1654214030, now seen corresponding path program 1 times [2020-10-29 09:11:47,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:47,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78803813] [2020-10-29 09:11:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:47,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:47,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:11:47,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:47,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-29 09:11:47,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:47,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:47,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:11:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:11:47,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:47,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:47,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:47,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:47,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:47,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:47,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:47,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:47,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:47,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:47,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:47,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:47,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78803813] [2020-10-29 09:11:47,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:47,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:11:47,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475171775] [2020-10-29 09:11:47,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:11:47,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:11:47,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:11:47,472 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-29 09:11:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:47,677 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-29 09:11:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:47,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-29 09:11:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:47,678 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:11:47,678 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 09:11:47,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 09:11:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-29 09:11:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:11:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-29 09:11:47,688 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 20 [2020-10-29 09:11:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:47,688 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-29 09:11:47,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:11:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-29 09:11:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:11:47,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:47,689 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:47,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:11:47,690 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash 128959175, now seen corresponding path program 1 times [2020-10-29 09:11:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:47,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764088519] [2020-10-29 09:11:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:47,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:47,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:11:47,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:47,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-29 09:11:47,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:47,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:47,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:11:47,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:47,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:11:47,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:48,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:48,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:48,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:48,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:48,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:48,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:48,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:48,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:48,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:48,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764088519] [2020-10-29 09:11:48,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:48,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:11:48,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485481250] [2020-10-29 09:11:48,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:11:48,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:48,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:11:48,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:11:48,046 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2020-10-29 09:11:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:48,209 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-29 09:11:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:11:48,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:11:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:48,210 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:11:48,210 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:11:48,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:11:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:11:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:11:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-29 09:11:48,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 23 [2020-10-29 09:11:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:48,219 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-29 09:11:48,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:11:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-29 09:11:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:11:48,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:48,220 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:48,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:11:48,220 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1442690721, now seen corresponding path program 1 times [2020-10-29 09:11:48,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:48,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486718442] [2020-10-29 09:11:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:48,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:48,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:11:48,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:48,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-29 09:11:48,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:48,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:11:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:48,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:11:48,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:48,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:49,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:49,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:49,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:49,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:49,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:49,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:49,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:49,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:49,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:49,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486718442] [2020-10-29 09:11:49,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:49,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495576465] [2020-10-29 09:11:49,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:49,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:49,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:49,009 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-29 09:11:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:49,259 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-29 09:11:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:11:49,260 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 09:11:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:49,261 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:11:49,261 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:11:49,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:11:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-29 09:11:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:11:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-29 09:11:49,269 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 23 [2020-10-29 09:11:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:49,270 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-29 09:11:49,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-29 09:11:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:11:49,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:49,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:49,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:11:49,271 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1868815080, now seen corresponding path program 1 times [2020-10-29 09:11:49,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:49,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914954445] [2020-10-29 09:11:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:49,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:49,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:11:49,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:49,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-29 09:11:49,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:49,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:49,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:11:49,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:49,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:49,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:49,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:49,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:49,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:49,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:49,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:49,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:49,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:49,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914954445] [2020-10-29 09:11:49,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:49,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:49,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955113913] [2020-10-29 09:11:49,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:49,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:49,677 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-10-29 09:11:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:50,066 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-29 09:11:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:50,067 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:11:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:50,068 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:11:50,068 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:11:50,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:11:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-29 09:11:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:11:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-29 09:11:50,077 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 26 [2020-10-29 09:11:50,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:50,077 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-29 09:11:50,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-29 09:11:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:11:50,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:50,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:50,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:11:50,079 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash 432007510, now seen corresponding path program 1 times [2020-10-29 09:11:50,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:50,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791721781] [2020-10-29 09:11:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:50,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:50,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:11:50,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:50,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-29 09:11:50,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:50,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:11:50,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:50,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:50,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:50,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:50,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:50,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:50,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:50,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:50,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:50,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:50,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:50,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:50,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:50,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791721781] [2020-10-29 09:11:50,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:50,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:50,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483707171] [2020-10-29 09:11:50,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:50,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:50,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:50,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:50,500 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 9 states. [2020-10-29 09:11:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:51,107 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-10-29 09:11:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:51,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:11:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:51,109 INFO L225 Difference]: With dead ends: 95 [2020-10-29 09:11:51,109 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:11:51,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:11:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2020-10-29 09:11:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:11:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-29 09:11:51,127 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 26 [2020-10-29 09:11:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:51,127 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-29 09:11:51,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-29 09:11:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:11:51,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:51,132 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] [2020-10-29 09:11:51,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:11:51,132 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1718954766, now seen corresponding path program 1 times [2020-10-29 09:11:51,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:51,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303513978] [2020-10-29 09:11:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:51,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:51,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:11:51,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:51,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-29 09:11:51,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:51,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:11:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:11:51,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:51,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:51,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:51,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:51,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:51,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:51,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:51,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:51,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:51,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:51,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:51,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:51,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303513978] [2020-10-29 09:11:51,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:51,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:11:51,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851205318] [2020-10-29 09:11:51,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:11:51,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:51,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:11:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:11:51,829 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 8 states. [2020-10-29 09:11:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:52,135 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-29 09:11:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:11:52,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-29 09:11:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:52,138 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:11:52,138 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:11:52,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:11:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-29 09:11:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:11:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-29 09:11:52,150 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 26 [2020-10-29 09:11:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:52,151 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-29 09:11:52,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:11:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-29 09:11:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:11:52,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:52,152 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:52,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:11:52,153 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1684555517, now seen corresponding path program 2 times [2020-10-29 09:11:52,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:52,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291163535] [2020-10-29 09:11:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:52,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:52,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:11:52,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:52,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-29 09:11:52,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:52,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:11:52,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:52,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:52,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:52,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:52,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:52,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:52,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:52,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:52,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:52,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291163535] [2020-10-29 09:11:52,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:52,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:52,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069831578] [2020-10-29 09:11:52,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:52,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:52,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:52,661 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 9 states. [2020-10-29 09:11:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:52,986 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-10-29 09:11:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:11:52,986 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-29 09:11:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:52,987 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:11:52,987 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:11:52,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:11:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:11:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:11:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-29 09:11:52,996 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 29 [2020-10-29 09:11:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:52,996 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-29 09:11:52,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-29 09:11:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:11:52,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:52,997 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:52,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:11:52,998 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2095142183, now seen corresponding path program 3 times [2020-10-29 09:11:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:52,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313132865] [2020-10-29 09:11:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:53,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:53,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:53,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:11:53,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:53,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-29 09:11:53,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:53,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:53,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:11:53,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:54,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:54,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:54,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:54,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:54,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:54,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:54,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:54,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:54,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313132865] [2020-10-29 09:11:54,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:54,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496151715] [2020-10-29 09:11:54,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:54,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:54,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:54,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:54,040 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 11 states. [2020-10-29 09:11:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:54,664 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2020-10-29 09:11:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:54,664 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-29 09:11:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:54,665 INFO L225 Difference]: With dead ends: 87 [2020-10-29 09:11:54,665 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:11:54,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:11:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:11:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-10-29 09:11:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:11:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-29 09:11:54,688 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2020-10-29 09:11:54,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:54,689 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-29 09:11:54,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-29 09:11:54,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:11:54,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:54,690 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:54,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:11:54,691 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:54,695 INFO L82 PathProgramCache]: Analyzing trace with hash 100997477, now seen corresponding path program 1 times [2020-10-29 09:11:54,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:54,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792391751] [2020-10-29 09:11:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:54,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:54,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:55,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:55,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:11:55,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:55,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-29 09:11:55,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:55,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:55,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:11:55,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:55,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:55,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:55,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:55,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:55,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:55,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:55,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:55,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:55,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:55,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:55,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:55,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:55,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792391751] [2020-10-29 09:11:55,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:55,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:55,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884636727] [2020-10-29 09:11:55,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:55,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:55,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:55,889 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 11 states. [2020-10-29 09:11:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:56,447 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-29 09:11:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:56,448 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-29 09:11:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:56,450 INFO L225 Difference]: With dead ends: 101 [2020-10-29 09:11:56,450 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:11:56,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:11:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:11:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-10-29 09:11:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:11:56,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-29 09:11:56,465 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2020-10-29 09:11:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:56,465 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-29 09:11:56,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-29 09:11:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:11:56,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:56,467 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:56,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:11:56,468 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2107257343, now seen corresponding path program 2 times [2020-10-29 09:11:56,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:56,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710399989] [2020-10-29 09:11:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:56,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:56,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:57,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:57,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:11:57,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:57,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-29 09:11:57,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:57,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:57,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:57,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:57,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:11:57,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:57,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:57,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:57,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:57,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:57,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:57,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:57,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:57,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:57,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:57,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:57,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:57,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:57,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710399989] [2020-10-29 09:11:57,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:57,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:57,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919538545] [2020-10-29 09:11:57,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:57,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:57,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:57,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:57,307 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 9 states. [2020-10-29 09:11:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:57,863 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-10-29 09:11:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:57,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-29 09:11:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:57,864 INFO L225 Difference]: With dead ends: 90 [2020-10-29 09:11:57,864 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:11:57,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:11:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-29 09:11:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:11:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-29 09:11:57,883 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 29 [2020-10-29 09:11:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:57,883 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-29 09:11:57,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-29 09:11:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:11:57,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:57,887 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] [2020-10-29 09:11:57,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:11:57,888 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash -43704933, now seen corresponding path program 1 times [2020-10-29 09:11:57,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:57,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477343466] [2020-10-29 09:11:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:57,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:58,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:58,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:11:58,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:58,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-29 09:11:58,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:58,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:11:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:58,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:11:58,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:58,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:58,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:58,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:58,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:58,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:58,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:58,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:58,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:58,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:58,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:58,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:58,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:11:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:58,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477343466] [2020-10-29 09:11:58,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:58,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:58,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100186514] [2020-10-29 09:11:58,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:58,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:58,397 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 10 states. [2020-10-29 09:11:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:58,933 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-29 09:11:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:58,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-29 09:11:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:58,935 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:11:58,935 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 09:11:58,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:11:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 09:11:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-10-29 09:11:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:11:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-29 09:11:58,951 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 29 [2020-10-29 09:11:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:58,952 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-29 09:11:58,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-29 09:11:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:11:58,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:58,952 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:58,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:11:58,953 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1777123287, now seen corresponding path program 2 times [2020-10-29 09:11:58,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:58,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129825665] [2020-10-29 09:11:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:59,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:11:59,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:59,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-29 09:11:59,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:59,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:59,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:59,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:59,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:11:59,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:59,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:59,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:59,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:59,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:59,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:59,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:59,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:59,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129825665] [2020-10-29 09:11:59,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:59,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:59,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119844736] [2020-10-29 09:11:59,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:59,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:59,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:59,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:59,536 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 11 states. [2020-10-29 09:12:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:00,092 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-10-29 09:12:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:12:00,092 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-29 09:12:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:00,093 INFO L225 Difference]: With dead ends: 87 [2020-10-29 09:12:00,093 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:12:00,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:12:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 70. [2020-10-29 09:12:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:12:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-29 09:12:00,110 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 29 [2020-10-29 09:12:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:00,110 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-29 09:12:00,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-29 09:12:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:12:00,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:00,111 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] [2020-10-29 09:12:00,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:12:00,111 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1809574030, now seen corresponding path program 4 times [2020-10-29 09:12:00,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:00,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791416934] [2020-10-29 09:12:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:00,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:00,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:00,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:12:00,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:00,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-29 09:12:00,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:00,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:00,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:12:00,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:00,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:00,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:00,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:00,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:00,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:00,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:12:00,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:00,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:00,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791416934] [2020-10-29 09:12:00,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:00,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:12:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066731662] [2020-10-29 09:12:00,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:12:00,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:00,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:12:00,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:12:00,815 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 11 states. [2020-10-29 09:12:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:01,457 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2020-10-29 09:12:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:01,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 09:12:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:01,459 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:12:01,460 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:12:01,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:12:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2020-10-29 09:12:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:12:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-29 09:12:01,473 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 32 [2020-10-29 09:12:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:01,473 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-29 09:12:01,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-29 09:12:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:12:01,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:01,475 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] [2020-10-29 09:12:01,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:12:01,475 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2062691440, now seen corresponding path program 3 times [2020-10-29 09:12:01,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:01,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210337476] [2020-10-29 09:12:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:01,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:01,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:01,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:12:01,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:01,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-29 09:12:01,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:01,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:01,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:01,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:01,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:12:01,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:02,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:02,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:02,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:02,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:02,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:02,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:02,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:02,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:02,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:02,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:02,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:02,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:02,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210337476] [2020-10-29 09:12:02,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:02,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:12:02,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339480889] [2020-10-29 09:12:02,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:12:02,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:02,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:12:02,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:12:02,146 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 11 states. [2020-10-29 09:12:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:02,988 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2020-10-29 09:12:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:02,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 09:12:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:02,992 INFO L225 Difference]: With dead ends: 137 [2020-10-29 09:12:02,992 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:12:02,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:12:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2020-10-29 09:12:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:12:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-10-29 09:12:03,012 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 32 [2020-10-29 09:12:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:03,013 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-10-29 09:12:03,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-10-29 09:12:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:12:03,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:03,014 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] [2020-10-29 09:12:03,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:12:03,014 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1675560524, now seen corresponding path program 4 times [2020-10-29 09:12:03,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:03,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217630970] [2020-10-29 09:12:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:03,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:04,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:04,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:12:04,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:04,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1321 [2020-10-29 09:12:04,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:04,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:12:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:04,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:12:04,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:04,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:04,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:04,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:04,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:04,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:04,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:04,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:04,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:04,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:04,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:04,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:04,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217630970] [2020-10-29 09:12:04,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:04,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:12:04,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040087368] [2020-10-29 09:12:04,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:12:04,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:04,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:12:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:12:04,713 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 11 states. [2020-10-29 09:12:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:05,492 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2020-10-29 09:12:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:05,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 09:12:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:05,496 INFO L225 Difference]: With dead ends: 137 [2020-10-29 09:12:05,496 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:12:05,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:12:05,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-10-29 09:12:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:12:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-10-29 09:12:05,510 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 32 [2020-10-29 09:12:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:05,510 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-10-29 09:12:05,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-10-29 09:12:05,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:12:05,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:05,511 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, 1] [2020-10-29 09:12:05,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:12:05,511 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:05,512 INFO L82 PathProgramCache]: Analyzing trace with hash -475401752, now seen corresponding path program 1 times [2020-10-29 09:12:05,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:05,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251888935] [2020-10-29 09:12:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:05,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:05,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:05,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:12:05,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:05,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-29 09:12:05,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:05,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:05,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:12:05,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:06,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:06,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:06,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:06,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:06,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:06,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:06,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251888935] [2020-10-29 09:12:06,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:06,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:06,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474419141] [2020-10-29 09:12:06,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:06,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:06,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:06,221 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 12 states. [2020-10-29 09:12:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:06,993 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2020-10-29 09:12:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:06,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:12:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:06,995 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:12:06,995 INFO L226 Difference]: Without dead ends: 134 [2020-10-29 09:12:06,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:12:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-29 09:12:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-10-29 09:12:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:12:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-29 09:12:07,008 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 32 [2020-10-29 09:12:07,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:07,008 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-29 09:12:07,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-29 09:12:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:12:07,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:07,009 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] [2020-10-29 09:12:07,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:12:07,010 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:07,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2098262350, now seen corresponding path program 3 times [2020-10-29 09:12:07,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:07,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859465568] [2020-10-29 09:12:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:07,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:08,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:08,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:12:08,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:08,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1511 [2020-10-29 09:12:08,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:08,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:08,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:12:08,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:08,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:12:08,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:08,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:08,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:08,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:08,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:08,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:08,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:08,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:08,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:08,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:08,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:08,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:08,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:08,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859465568] [2020-10-29 09:12:08,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:08,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:12:08,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414804685] [2020-10-29 09:12:08,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:12:08,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:12:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:12:08,842 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 11 states. [2020-10-29 09:12:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:09,586 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-29 09:12:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:09,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-29 09:12:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:09,588 INFO L225 Difference]: With dead ends: 132 [2020-10-29 09:12:09,588 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 09:12:09,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 09:12:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-10-29 09:12:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:12:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2020-10-29 09:12:09,600 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 32 [2020-10-29 09:12:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:09,600 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2020-10-29 09:12:09,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2020-10-29 09:12:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:12:09,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:09,601 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] [2020-10-29 09:12:09,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:12:09,601 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:09,602 INFO L82 PathProgramCache]: Analyzing trace with hash -52699926, now seen corresponding path program 2 times [2020-10-29 09:12:09,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:09,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419042093] [2020-10-29 09:12:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:09,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:10,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:10,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:12:10,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-29 09:12:10,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:10,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:12:10,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:10,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:10,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:10,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:10,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:10,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:10,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:10,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:10,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:10,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:10,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:10,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:10,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:10,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419042093] [2020-10-29 09:12:10,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:10,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130245912] [2020-10-29 09:12:10,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:10,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:10,315 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 12 states. [2020-10-29 09:12:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:11,051 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2020-10-29 09:12:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:11,055 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:12:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:11,056 INFO L225 Difference]: With dead ends: 144 [2020-10-29 09:12:11,057 INFO L226 Difference]: Without dead ends: 140 [2020-10-29 09:12:11,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:12:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-29 09:12:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 101. [2020-10-29 09:12:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:12:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2020-10-29 09:12:11,074 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 32 [2020-10-29 09:12:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:11,075 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2020-10-29 09:12:11,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2020-10-29 09:12:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:12:11,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:11,077 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:11,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:12:11,077 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1058277228, now seen corresponding path program 1 times [2020-10-29 09:12:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:11,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392623546] [2020-10-29 09:12:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:11,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:11,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:12:11,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:11,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-29 09:12:11,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:11,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:12:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:11,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:12:11,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:11,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:11,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:11,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:11,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:11,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:11,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:11,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:11,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392623546] [2020-10-29 09:12:11,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:11,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:12:11,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248471316] [2020-10-29 09:12:11,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:12:11,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:12:11,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:12:11,806 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 10 states. [2020-10-29 09:12:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:12,317 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-10-29 09:12:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:12:12,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-29 09:12:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:12,319 INFO L225 Difference]: With dead ends: 132 [2020-10-29 09:12:12,319 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 09:12:12,320 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 [2020-10-29 09:12:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 09:12:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-29 09:12:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:12:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2020-10-29 09:12:12,331 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 34 [2020-10-29 09:12:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:12,331 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2020-10-29 09:12:12,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:12:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2020-10-29 09:12:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:12,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:12,332 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] [2020-10-29 09:12:12,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:12:12,332 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1516025913, now seen corresponding path program 5 times [2020-10-29 09:12:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:12,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068031912] [2020-10-29 09:12:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:12,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:12,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:12,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:12,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:12,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-29 09:12:12,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:12,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:12:12,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:13,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:13,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:13,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:13,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:13,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:13,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:13,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:13,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:13,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:13,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:13,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:13,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:13,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068031912] [2020-10-29 09:12:13,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:13,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:12:13,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3482686] [2020-10-29 09:12:13,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:12:13,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:13,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:12:13,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:12:13,272 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand 11 states. [2020-10-29 09:12:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:13,814 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-10-29 09:12:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:13,815 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-29 09:12:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:13,816 INFO L225 Difference]: With dead ends: 121 [2020-10-29 09:12:13,816 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:12:13,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:12:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-29 09:12:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 09:12:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2020-10-29 09:12:13,828 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 35 [2020-10-29 09:12:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:13,828 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2020-10-29 09:12:13,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2020-10-29 09:12:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:13,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:13,829 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] [2020-10-29 09:12:13,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:12:13,830 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1795518115, now seen corresponding path program 6 times [2020-10-29 09:12:13,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:13,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678801473] [2020-10-29 09:12:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:14,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:14,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:14,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:14,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-29 09:12:14,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:14,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:14,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:14,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:14,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:12:14,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:14,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:14,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:14,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:14,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:14,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:14,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:14,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:14,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:14,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678801473] [2020-10-29 09:12:14,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:14,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:14,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978226769] [2020-10-29 09:12:14,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:14,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:14,911 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand 12 states. [2020-10-29 09:12:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:15,693 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2020-10-29 09:12:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:15,693 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-29 09:12:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:15,695 INFO L225 Difference]: With dead ends: 152 [2020-10-29 09:12:15,695 INFO L226 Difference]: Without dead ends: 148 [2020-10-29 09:12:15,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:12:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-29 09:12:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2020-10-29 09:12:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:12:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2020-10-29 09:12:15,707 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 35 [2020-10-29 09:12:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:15,707 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2020-10-29 09:12:15,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2020-10-29 09:12:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:15,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:15,708 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] [2020-10-29 09:12:15,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:12:15,709 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1372816289, now seen corresponding path program 5 times [2020-10-29 09:12:15,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:15,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837057419] [2020-10-29 09:12:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:15,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:15,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:16,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:16,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:16,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-29 09:12:16,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:16,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:12:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:16,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:16,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:16,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:16,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:16,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:16,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:16,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:16,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837057419] [2020-10-29 09:12:16,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:16,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:16,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22129222] [2020-10-29 09:12:16,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:16,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:16,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:16,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:16,814 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 13 states. [2020-10-29 09:12:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:17,638 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-10-29 09:12:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:17,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:12:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:17,641 INFO L225 Difference]: With dead ends: 157 [2020-10-29 09:12:17,641 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:12:17,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:12:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:12:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-10-29 09:12:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 09:12:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2020-10-29 09:12:17,654 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 35 [2020-10-29 09:12:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:17,655 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2020-10-29 09:12:17,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2020-10-29 09:12:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:17,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:17,656 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] [2020-10-29 09:12:17,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:12:17,656 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1650039419, now seen corresponding path program 6 times [2020-10-29 09:12:17,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:17,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878392766] [2020-10-29 09:12:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:17,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:17,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:18,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:18,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:18,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:18,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-10-29 09:12:18,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:18,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:18,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:18,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:18,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:12:18,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:19,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:19,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:19,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:19,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:19,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:19,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:19,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:19,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:19,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:19,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:19,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:19,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:19,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878392766] [2020-10-29 09:12:19,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:19,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:12:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291592265] [2020-10-29 09:12:19,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:12:19,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:19,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:12:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:12:19,108 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand 11 states. [2020-10-29 09:12:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:20,063 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2020-10-29 09:12:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:20,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-29 09:12:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:20,065 INFO L225 Difference]: With dead ends: 140 [2020-10-29 09:12:20,065 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:12:20,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:12:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2020-10-29 09:12:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:12:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-10-29 09:12:20,078 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 35 [2020-10-29 09:12:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:20,079 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-10-29 09:12:20,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-10-29 09:12:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:20,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:20,080 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, 1] [2020-10-29 09:12:20,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:12:20,080 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:20,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:20,080 INFO L82 PathProgramCache]: Analyzing trace with hash 493965601, now seen corresponding path program 2 times [2020-10-29 09:12:20,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:20,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944027425] [2020-10-29 09:12:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:20,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:20,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:20,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-29 09:12:20,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:20,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:20,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:12:20,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:20,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:20,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:20,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:20,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:20,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944027425] [2020-10-29 09:12:20,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:20,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:20,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118712910] [2020-10-29 09:12:20,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:20,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:20,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:20,816 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 12 states. [2020-10-29 09:12:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:21,551 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2020-10-29 09:12:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:21,552 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-29 09:12:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:21,553 INFO L225 Difference]: With dead ends: 136 [2020-10-29 09:12:21,553 INFO L226 Difference]: Without dead ends: 132 [2020-10-29 09:12:21,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:12:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-29 09:12:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2020-10-29 09:12:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:12:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-10-29 09:12:21,568 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 35 [2020-10-29 09:12:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:21,568 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-10-29 09:12:21,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-10-29 09:12:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:21,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:21,569 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] [2020-10-29 09:12:21,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:12:21,569 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1929531621, now seen corresponding path program 7 times [2020-10-29 09:12:21,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:21,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877315235] [2020-10-29 09:12:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:21,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:21,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:21,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:21,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:21,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-29 09:12:21,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:21,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:21,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:21,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:21,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:12:21,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:22,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:22,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:22,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:22,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:22,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:22,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:22,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:22,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:22,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:22,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:22,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:22,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:22,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877315235] [2020-10-29 09:12:22,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:22,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:22,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020157837] [2020-10-29 09:12:22,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:22,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:22,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:22,289 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 13 states. [2020-10-29 09:12:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:23,158 INFO L93 Difference]: Finished difference Result 193 states and 222 transitions. [2020-10-29 09:12:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:23,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:12:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:23,160 INFO L225 Difference]: With dead ends: 193 [2020-10-29 09:12:23,160 INFO L226 Difference]: Without dead ends: 189 [2020-10-29 09:12:23,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-29 09:12:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 116. [2020-10-29 09:12:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-29 09:12:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2020-10-29 09:12:23,186 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 35 [2020-10-29 09:12:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:23,186 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2020-10-29 09:12:23,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2020-10-29 09:12:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:23,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:23,187 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] [2020-10-29 09:12:23,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:12:23,188 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:23,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1506829795, now seen corresponding path program 8 times [2020-10-29 09:12:23,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:23,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808590160] [2020-10-29 09:12:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:23,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:12:23,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:23,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:23,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:23,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:23,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:23,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808590160] [2020-10-29 09:12:23,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:23,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:23,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541981116] [2020-10-29 09:12:23,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:23,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:23,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:23,942 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 13 states. [2020-10-29 09:12:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:24,740 INFO L93 Difference]: Finished difference Result 160 states and 183 transitions. [2020-10-29 09:12:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:24,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:12:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:24,742 INFO L225 Difference]: With dead ends: 160 [2020-10-29 09:12:24,742 INFO L226 Difference]: Without dead ends: 156 [2020-10-29 09:12:24,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-29 09:12:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 107. [2020-10-29 09:12:24,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:12:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-10-29 09:12:24,761 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 35 [2020-10-29 09:12:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:24,761 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-10-29 09:12:24,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-10-29 09:12:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:24,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:24,766 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, 1, 1] [2020-10-29 09:12:24,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:12:24,768 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2023252357, now seen corresponding path program 3 times [2020-10-29 09:12:24,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:24,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481290486] [2020-10-29 09:12:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:24,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:25,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:25,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:25,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:25,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-29 09:12:25,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:25,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:25,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:25,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:25,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:12:25,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:25,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:25,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:25,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:25,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:25,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:25,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:25,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:25,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:25,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:25,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:12:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:25,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481290486] [2020-10-29 09:12:25,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:25,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579931071] [2020-10-29 09:12:25,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:25,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:25,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:25,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:25,671 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 13 states. [2020-10-29 09:12:26,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:26,621 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2020-10-29 09:12:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:12:26,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:12:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:26,624 INFO L225 Difference]: With dead ends: 162 [2020-10-29 09:12:26,624 INFO L226 Difference]: Without dead ends: 158 [2020-10-29 09:12:26,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:26,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-29 09:12:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 110. [2020-10-29 09:12:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-29 09:12:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2020-10-29 09:12:26,640 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 35 [2020-10-29 09:12:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:26,640 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2020-10-29 09:12:26,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2020-10-29 09:12:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:12:26,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:26,641 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, 1, 1] [2020-10-29 09:12:26,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:12:26,642 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:26,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1600550531, now seen corresponding path program 4 times [2020-10-29 09:12:26,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:26,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855204172] [2020-10-29 09:12:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:26,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:27,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:27,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:12:27,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:27,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-29 09:12:27,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:27,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:27,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:27,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:27,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:12:27,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:27,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:27,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:27,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:27,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:27,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855204172] [2020-10-29 09:12:27,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:27,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:27,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303243832] [2020-10-29 09:12:27,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:27,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:27,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:27,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:27,614 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand 13 states. [2020-10-29 09:12:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:28,552 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2020-10-29 09:12:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:28,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:12:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:28,557 INFO L225 Difference]: With dead ends: 139 [2020-10-29 09:12:28,557 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 09:12:28,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 09:12:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2020-10-29 09:12:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:12:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-10-29 09:12:28,569 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 35 [2020-10-29 09:12:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:28,569 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-10-29 09:12:28,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-10-29 09:12:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:12:28,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:28,570 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, 1, 1, 1] [2020-10-29 09:12:28,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:12:28,570 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:28,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash -367469761, now seen corresponding path program 1 times [2020-10-29 09:12:28,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:28,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972586600] [2020-10-29 09:12:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:28,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:28,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:28,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:12:28,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:28,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-29 09:12:28,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:28,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:28,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:12:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:29,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:29,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:29,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:29,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:29,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:29,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:29,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:29,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:29,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:29,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:29,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:29,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972586600] [2020-10-29 09:12:29,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:29,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:29,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317593156] [2020-10-29 09:12:29,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:29,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:29,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:29,485 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 13 states. [2020-10-29 09:12:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:30,381 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2020-10-29 09:12:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:12:30,382 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-29 09:12:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:30,383 INFO L225 Difference]: With dead ends: 166 [2020-10-29 09:12:30,383 INFO L226 Difference]: Without dead ends: 153 [2020-10-29 09:12:30,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:12:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-29 09:12:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 124. [2020-10-29 09:12:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-29 09:12:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2020-10-29 09:12:30,400 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 37 [2020-10-29 09:12:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:30,400 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2020-10-29 09:12:30,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2020-10-29 09:12:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:12:30,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:30,401 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, 1, 1] [2020-10-29 09:12:30,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:12:30,401 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:30,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:30,402 INFO L82 PathProgramCache]: Analyzing trace with hash -305430147, now seen corresponding path program 2 times [2020-10-29 09:12:30,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:30,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228973581] [2020-10-29 09:12:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:30,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:30,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:30,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:12:30,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:30,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-29 09:12:30,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:30,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:30,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:12:30,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:31,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:31,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:31,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:31,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:31,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:31,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:12:31,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:31,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:31,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:12:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:31,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228973581] [2020-10-29 09:12:31,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:31,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:31,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186478336] [2020-10-29 09:12:31,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:31,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:31,195 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand 13 states. [2020-10-29 09:12:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:32,658 INFO L93 Difference]: Finished difference Result 216 states and 246 transitions. [2020-10-29 09:12:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:12:32,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-29 09:12:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:32,661 INFO L225 Difference]: With dead ends: 216 [2020-10-29 09:12:32,661 INFO L226 Difference]: Without dead ends: 212 [2020-10-29 09:12:32,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:12:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-29 09:12:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 153. [2020-10-29 09:12:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-29 09:12:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2020-10-29 09:12:32,683 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 37 [2020-10-29 09:12:32,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:32,683 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2020-10-29 09:12:32,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2020-10-29 09:12:32,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:12:32,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:32,685 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:32,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:12:32,685 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:32,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:32,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1059314202, now seen corresponding path program 9 times [2020-10-29 09:12:32,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:32,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026515987] [2020-10-29 09:12:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:32,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:32,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:33,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:35,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:35,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:12:35,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:35,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2374 [2020-10-29 09:12:35,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:35,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:35,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:12:35,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:35,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:35,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:35,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:35,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:35,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:35,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:35,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:35,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:35,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:35,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:35,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026515987] [2020-10-29 09:12:35,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:35,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:35,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613140896] [2020-10-29 09:12:35,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:35,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:35,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:35,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:35,403 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand 13 states. [2020-10-29 09:12:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:36,107 INFO L93 Difference]: Finished difference Result 194 states and 218 transitions. [2020-10-29 09:12:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:36,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-29 09:12:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:36,109 INFO L225 Difference]: With dead ends: 194 [2020-10-29 09:12:36,110 INFO L226 Difference]: Without dead ends: 181 [2020-10-29 09:12:36,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-29 09:12:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 161. [2020-10-29 09:12:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-29 09:12:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 179 transitions. [2020-10-29 09:12:36,127 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 179 transitions. Word has length 38 [2020-10-29 09:12:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:36,127 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 179 transitions. [2020-10-29 09:12:36,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 179 transitions. [2020-10-29 09:12:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:12:36,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:36,128 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:36,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:12:36,129 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:36,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1091648074, now seen corresponding path program 5 times [2020-10-29 09:12:36,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:36,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35344027] [2020-10-29 09:12:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:36,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:36,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:12:36,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:36,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:36,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:36,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:36,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:36,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:36,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:36,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:36,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:36,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:36,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:36,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35344027] [2020-10-29 09:12:36,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:36,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:36,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455475911] [2020-10-29 09:12:36,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:36,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:36,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:36,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:36,994 INFO L87 Difference]: Start difference. First operand 161 states and 179 transitions. Second operand 14 states. [2020-10-29 09:12:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:38,198 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2020-10-29 09:12:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:12:38,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-29 09:12:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:38,200 INFO L225 Difference]: With dead ends: 215 [2020-10-29 09:12:38,200 INFO L226 Difference]: Without dead ends: 211 [2020-10-29 09:12:38,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-29 09:12:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 164. [2020-10-29 09:12:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 09:12:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2020-10-29 09:12:38,220 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 38 [2020-10-29 09:12:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:38,220 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2020-10-29 09:12:38,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2020-10-29 09:12:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:12:38,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:38,221 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:38,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:12:38,221 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1225661580, now seen corresponding path program 6 times [2020-10-29 09:12:38,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:38,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185997373] [2020-10-29 09:12:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:38,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:38,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:12:38,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:38,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-10-29 09:12:38,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:38,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:12:38,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:39,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:39,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:39,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:39,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185997373] [2020-10-29 09:12:39,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:39,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:39,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592026737] [2020-10-29 09:12:39,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:39,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:39,323 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand 14 states. [2020-10-29 09:12:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:40,397 INFO L93 Difference]: Finished difference Result 220 states and 248 transitions. [2020-10-29 09:12:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:12:40,398 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-29 09:12:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:40,400 INFO L225 Difference]: With dead ends: 220 [2020-10-29 09:12:40,400 INFO L226 Difference]: Without dead ends: 216 [2020-10-29 09:12:40,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:12:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-29 09:12:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 164. [2020-10-29 09:12:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 09:12:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2020-10-29 09:12:40,421 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 38 [2020-10-29 09:12:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:40,421 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2020-10-29 09:12:40,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2020-10-29 09:12:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:12:40,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:40,423 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:40,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:12:40,423 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:40,423 INFO L82 PathProgramCache]: Analyzing trace with hash 844699558, now seen corresponding path program 2 times [2020-10-29 09:12:40,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:40,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761272761] [2020-10-29 09:12:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:40,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:40,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:41,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:41,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:12:41,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:41,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-29 09:12:41,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:41,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:41,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:41,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:41,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:12:41,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:41,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:41,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:41,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:41,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:12:41,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:41,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:41,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:41,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:41,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:41,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761272761] [2020-10-29 09:12:41,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:41,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:41,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379098929] [2020-10-29 09:12:41,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:41,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:41,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:41,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:41,322 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand 12 states. [2020-10-29 09:12:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:42,093 INFO L93 Difference]: Finished difference Result 198 states and 220 transitions. [2020-10-29 09:12:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:42,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-29 09:12:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:42,095 INFO L225 Difference]: With dead ends: 198 [2020-10-29 09:12:42,095 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:12:42,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:12:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:12:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-10-29 09:12:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 09:12:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 183 transitions. [2020-10-29 09:12:42,120 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 183 transitions. Word has length 40 [2020-10-29 09:12:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:42,120 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 183 transitions. [2020-10-29 09:12:42,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 183 transitions. [2020-10-29 09:12:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:12:42,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:42,121 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:42,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:12:42,121 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:42,122 INFO L82 PathProgramCache]: Analyzing trace with hash 473533302, now seen corresponding path program 3 times [2020-10-29 09:12:42,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:42,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098507524] [2020-10-29 09:12:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:42,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:42,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:12:42,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:43,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:43,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:43,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:43,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:43,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:43,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:43,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:43,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:43,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:43,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:43,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098507524] [2020-10-29 09:12:43,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:43,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:43,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982570142] [2020-10-29 09:12:43,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:43,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:43,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:43,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:43,147 INFO L87 Difference]: Start difference. First operand 164 states and 183 transitions. Second operand 13 states. [2020-10-29 09:12:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:43,950 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2020-10-29 09:12:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:43,950 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-29 09:12:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:43,952 INFO L225 Difference]: With dead ends: 187 [2020-10-29 09:12:43,952 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:12:43,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:12:43,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-29 09:12:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-29 09:12:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2020-10-29 09:12:43,971 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 40 [2020-10-29 09:12:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:43,971 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2020-10-29 09:12:43,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2020-10-29 09:12:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:12:43,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:43,972 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:43,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:12:43,973 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1864428916, now seen corresponding path program 4 times [2020-10-29 09:12:43,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:43,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37419431] [2020-10-29 09:12:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:44,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:44,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:12:44,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:44,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-29 09:12:44,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:44,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:44,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:12:44,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:45,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:45,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:45,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:45,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:45,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:45,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:45,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:45,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:45,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:45,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37419431] [2020-10-29 09:12:45,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:45,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:45,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533731614] [2020-10-29 09:12:45,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:45,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:45,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:45,482 INFO L87 Difference]: Start difference. First operand 139 states and 156 transitions. Second operand 15 states. [2020-10-29 09:12:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:46,745 INFO L93 Difference]: Finished difference Result 223 states and 251 transitions. [2020-10-29 09:12:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:12:46,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:12:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:46,747 INFO L225 Difference]: With dead ends: 223 [2020-10-29 09:12:46,747 INFO L226 Difference]: Without dead ends: 210 [2020-10-29 09:12:46,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:12:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-29 09:12:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 170. [2020-10-29 09:12:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-29 09:12:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 191 transitions. [2020-10-29 09:12:46,764 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 191 transitions. Word has length 40 [2020-10-29 09:12:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:46,764 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 191 transitions. [2020-10-29 09:12:46,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 191 transitions. [2020-10-29 09:12:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:12:46,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:46,765 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:46,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:12:46,766 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:46,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1802389302, now seen corresponding path program 5 times [2020-10-29 09:12:46,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:46,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513897170] [2020-10-29 09:12:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:47,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:47,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:47,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:12:47,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-29 09:12:47,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:47,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:12:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:47,960 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-29 09:12:48,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:48,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:48,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:48,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:48,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:48,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:48,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513897170] [2020-10-29 09:12:48,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:48,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:48,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459063033] [2020-10-29 09:12:48,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:48,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:48,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:48,391 INFO L87 Difference]: Start difference. First operand 170 states and 191 transitions. Second operand 15 states. [2020-10-29 09:12:49,098 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:12:49,288 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:12:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:50,493 INFO L93 Difference]: Finished difference Result 255 states and 288 transitions. [2020-10-29 09:12:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:12:50,494 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:12:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:50,496 INFO L225 Difference]: With dead ends: 255 [2020-10-29 09:12:50,496 INFO L226 Difference]: Without dead ends: 242 [2020-10-29 09:12:50,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:12:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-29 09:12:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 170. [2020-10-29 09:12:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-29 09:12:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 191 transitions. [2020-10-29 09:12:50,519 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 191 transitions. Word has length 40 [2020-10-29 09:12:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:50,519 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 191 transitions. [2020-10-29 09:12:50,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 191 transitions. [2020-10-29 09:12:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:12:50,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:50,520 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-29 09:12:50,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:12:50,520 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:50,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1859736696, now seen corresponding path program 3 times [2020-10-29 09:12:50,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:50,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165745343] [2020-10-29 09:12:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:50,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:51,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:51,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:12:51,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:51,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-29 09:12:51,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:51,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:51,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:51,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:51,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:12:51,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:52,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:52,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:52,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:52,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165745343] [2020-10-29 09:12:52,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:52,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:52,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819089170] [2020-10-29 09:12:52,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:52,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:52,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:52,026 INFO L87 Difference]: Start difference. First operand 170 states and 191 transitions. Second operand 13 states. [2020-10-29 09:12:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:52,800 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2020-10-29 09:12:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:52,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-29 09:12:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:52,802 INFO L225 Difference]: With dead ends: 194 [2020-10-29 09:12:52,802 INFO L226 Difference]: Without dead ends: 181 [2020-10-29 09:12:52,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-29 09:12:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 162. [2020-10-29 09:12:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-29 09:12:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 182 transitions. [2020-10-29 09:12:52,822 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 182 transitions. Word has length 40 [2020-10-29 09:12:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:52,822 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 182 transitions. [2020-10-29 09:12:52,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 182 transitions. [2020-10-29 09:12:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:12:52,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:52,823 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:52,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:12:52,824 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:52,824 INFO L82 PathProgramCache]: Analyzing trace with hash -291225580, now seen corresponding path program 1 times [2020-10-29 09:12:52,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:52,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782967890] [2020-10-29 09:12:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:52,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:53,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:53,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:12:53,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:53,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-29 09:12:53,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:53,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:53,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:12:53,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:53,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:53,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:53,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:53,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:53,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:53,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:53,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:53,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:53,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782967890] [2020-10-29 09:12:53,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:53,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:53,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328397623] [2020-10-29 09:12:53,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:53,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:53,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:53,528 INFO L87 Difference]: Start difference. First operand 162 states and 182 transitions. Second operand 14 states. [2020-10-29 09:12:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:54,640 INFO L93 Difference]: Finished difference Result 190 states and 213 transitions. [2020-10-29 09:12:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:12:54,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-29 09:12:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:54,642 INFO L225 Difference]: With dead ends: 190 [2020-10-29 09:12:54,642 INFO L226 Difference]: Without dead ends: 186 [2020-10-29 09:12:54,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:12:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-29 09:12:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2020-10-29 09:12:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-29 09:12:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 182 transitions. [2020-10-29 09:12:54,669 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 182 transitions. Word has length 40 [2020-10-29 09:12:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:54,669 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 182 transitions. [2020-10-29 09:12:54,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 182 transitions. [2020-10-29 09:12:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:12:54,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:54,670 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:54,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:12:54,671 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:54,671 INFO L82 PathProgramCache]: Analyzing trace with hash -478225522, now seen corresponding path program 6 times [2020-10-29 09:12:54,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:54,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988132272] [2020-10-29 09:12:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:54,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:12:55,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:55,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:55,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:55,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:55,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:55,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:55,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:55,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:55,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:55,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:55,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:55,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:55,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:55,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988132272] [2020-10-29 09:12:55,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:55,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:55,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426361282] [2020-10-29 09:12:55,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:55,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:55,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:55,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:55,833 INFO L87 Difference]: Start difference. First operand 162 states and 182 transitions. Second operand 15 states. [2020-10-29 09:12:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:57,149 INFO L93 Difference]: Finished difference Result 286 states and 322 transitions. [2020-10-29 09:12:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:57,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:12:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:57,151 INFO L225 Difference]: With dead ends: 286 [2020-10-29 09:12:57,151 INFO L226 Difference]: Without dead ends: 282 [2020-10-29 09:12:57,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:12:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-29 09:12:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 205. [2020-10-29 09:12:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-29 09:12:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 232 transitions. [2020-10-29 09:12:57,182 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 232 transitions. Word has length 40 [2020-10-29 09:12:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:57,182 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 232 transitions. [2020-10-29 09:12:57,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 232 transitions. [2020-10-29 09:12:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:12:57,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:57,183 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, 1] [2020-10-29 09:12:57,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:12:57,184 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:57,184 INFO L82 PathProgramCache]: Analyzing trace with hash -416185908, now seen corresponding path program 4 times [2020-10-29 09:12:57,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:57,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385770605] [2020-10-29 09:12:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:57,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:58,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:58,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:12:58,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:58,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-10-29 09:12:58,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:58,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:58,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:58,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:58,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:12:58,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:58,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:58,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:58,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:58,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385770605] [2020-10-29 09:12:58,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:58,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:58,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553308202] [2020-10-29 09:12:58,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:58,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:58,569 INFO L87 Difference]: Start difference. First operand 205 states and 232 transitions. Second operand 15 states. [2020-10-29 09:12:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:59,900 INFO L93 Difference]: Finished difference Result 263 states and 295 transitions. [2020-10-29 09:12:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:59,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:12:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:59,902 INFO L225 Difference]: With dead ends: 263 [2020-10-29 09:12:59,902 INFO L226 Difference]: Without dead ends: 259 [2020-10-29 09:12:59,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:12:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-29 09:12:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 183. [2020-10-29 09:12:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-29 09:12:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2020-10-29 09:12:59,941 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 40 [2020-10-29 09:12:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:59,941 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2020-10-29 09:12:59,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2020-10-29 09:12:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:12:59,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:59,942 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:59,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:12:59,942 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:59,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2058318591, now seen corresponding path program 7 times [2020-10-29 09:12:59,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:59,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820359474] [2020-10-29 09:12:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:00,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:00,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:00,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:13:00,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:00,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-29 09:13:00,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:00,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:13:00,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:01,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:01,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:01,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:01,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:01,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:01,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:01,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:01,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:01,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:01,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:01,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820359474] [2020-10-29 09:13:01,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:01,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:01,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331022345] [2020-10-29 09:13:01,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:01,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:01,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:01,429 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand 15 states. [2020-10-29 09:13:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:02,988 INFO L93 Difference]: Finished difference Result 235 states and 262 transitions. [2020-10-29 09:13:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:13:02,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-29 09:13:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:02,991 INFO L225 Difference]: With dead ends: 235 [2020-10-29 09:13:02,992 INFO L226 Difference]: Without dead ends: 231 [2020-10-29 09:13:02,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:13:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-29 09:13:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 186. [2020-10-29 09:13:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-29 09:13:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 209 transitions. [2020-10-29 09:13:03,013 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 209 transitions. Word has length 41 [2020-10-29 09:13:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:03,013 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 209 transitions. [2020-10-29 09:13:03,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 209 transitions. [2020-10-29 09:13:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:13:03,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:03,014 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-29 09:13:03,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:13:03,014 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2102635199, now seen corresponding path program 8 times [2020-10-29 09:13:03,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:03,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127347023] [2020-10-29 09:13:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:03,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:03,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:13:03,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:03,824 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-29 09:13:04,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:04,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:04,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:04,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:04,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:04,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:13:04,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:04,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:04,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:04,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127347023] [2020-10-29 09:13:04,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:04,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:04,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774100186] [2020-10-29 09:13:04,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:04,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:04,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:04,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:04,384 INFO L87 Difference]: Start difference. First operand 186 states and 209 transitions. Second operand 15 states. [2020-10-29 09:13:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:05,690 INFO L93 Difference]: Finished difference Result 218 states and 244 transitions. [2020-10-29 09:13:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:13:05,691 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-29 09:13:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:05,692 INFO L225 Difference]: With dead ends: 218 [2020-10-29 09:13:05,692 INFO L226 Difference]: Without dead ends: 214 [2020-10-29 09:13:05,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:13:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-29 09:13:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 166. [2020-10-29 09:13:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 09:13:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2020-10-29 09:13:05,717 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 41 [2020-10-29 09:13:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:05,718 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2020-10-29 09:13:05,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2020-10-29 09:13:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:13:05,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:05,719 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:05,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:13:05,719 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -412731343, now seen corresponding path program 7 times [2020-10-29 09:13:05,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:05,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968351697] [2020-10-29 09:13:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:05,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:06,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:13:06,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:06,514 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-29 09:13:06,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:06,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:06,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:06,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:06,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:06,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:06,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:06,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:06,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:06,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:06,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968351697] [2020-10-29 09:13:06,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:06,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:06,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911142593] [2020-10-29 09:13:06,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:06,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:06,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:06,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:06,884 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand 15 states. [2020-10-29 09:13:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:08,270 INFO L93 Difference]: Finished difference Result 265 states and 294 transitions. [2020-10-29 09:13:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:13:08,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-29 09:13:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:08,272 INFO L225 Difference]: With dead ends: 265 [2020-10-29 09:13:08,272 INFO L226 Difference]: Without dead ends: 252 [2020-10-29 09:13:08,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:13:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-29 09:13:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 207. [2020-10-29 09:13:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-29 09:13:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2020-10-29 09:13:08,299 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 43 [2020-10-29 09:13:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:08,299 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2020-10-29 09:13:08,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2020-10-29 09:13:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:13:08,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:08,300 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:08,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:13:08,300 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash 973472051, now seen corresponding path program 8 times [2020-10-29 09:13:08,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:08,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715238802] [2020-10-29 09:13:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:08,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:08,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:08,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:13:08,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:08,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-29 09:13:08,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:08,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:13:08,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:09,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:09,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:09,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:09,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:09,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:09,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:09,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:09,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:09,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:09,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:09,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:09,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715238802] [2020-10-29 09:13:09,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:09,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:09,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015407494] [2020-10-29 09:13:09,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:09,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:09,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:09,600 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand 15 states. [2020-10-29 09:13:11,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:11,407 INFO L93 Difference]: Finished difference Result 302 states and 338 transitions. [2020-10-29 09:13:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:13:11,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-29 09:13:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:11,409 INFO L225 Difference]: With dead ends: 302 [2020-10-29 09:13:11,409 INFO L226 Difference]: Without dead ends: 298 [2020-10-29 09:13:11,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:13:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-29 09:13:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 231. [2020-10-29 09:13:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-29 09:13:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 255 transitions. [2020-10-29 09:13:11,438 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 255 transitions. Word has length 43 [2020-10-29 09:13:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:11,438 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 255 transitions. [2020-10-29 09:13:11,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 255 transitions. [2020-10-29 09:13:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:13:11,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:11,440 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:11,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:13:11,440 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash -516459321, now seen corresponding path program 9 times [2020-10-29 09:13:11,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:11,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908589871] [2020-10-29 09:13:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:11,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2022 [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:13:13,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:13,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:13,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:13,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:13,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:13,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:13,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:13,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:13,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:13,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908589871] [2020-10-29 09:13:13,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:13,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:13,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854445940] [2020-10-29 09:13:13,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:13,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:13,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:13,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:13,973 INFO L87 Difference]: Start difference. First operand 231 states and 255 transitions. Second operand 15 states. [2020-10-29 09:13:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:15,145 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2020-10-29 09:13:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:13:15,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-29 09:13:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:15,147 INFO L225 Difference]: With dead ends: 306 [2020-10-29 09:13:15,148 INFO L226 Difference]: Without dead ends: 293 [2020-10-29 09:13:15,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:13:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-29 09:13:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 270. [2020-10-29 09:13:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-29 09:13:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 298 transitions. [2020-10-29 09:13:15,184 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 298 transitions. Word has length 43 [2020-10-29 09:13:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:15,185 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 298 transitions. [2020-10-29 09:13:15,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 298 transitions. [2020-10-29 09:13:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:13:15,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:15,186 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:15,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:13:15,186 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:15,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1627545699, now seen corresponding path program 1 times [2020-10-29 09:13:15,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:15,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139064518] [2020-10-29 09:13:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:15,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:15,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:15,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:13:15,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:15,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-29 09:13:15,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:15,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:15,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:13:15,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:16,174 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-29 09:13:16,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:16,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:16,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:16,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:16,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:16,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:16,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:16,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:16,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:16,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139064518] [2020-10-29 09:13:16,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:16,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:16,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457271352] [2020-10-29 09:13:16,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:16,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:16,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:16,531 INFO L87 Difference]: Start difference. First operand 270 states and 298 transitions. Second operand 16 states. [2020-10-29 09:13:18,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:18,269 INFO L93 Difference]: Finished difference Result 341 states and 376 transitions. [2020-10-29 09:13:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:13:18,269 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-29 09:13:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:18,272 INFO L225 Difference]: With dead ends: 341 [2020-10-29 09:13:18,272 INFO L226 Difference]: Without dead ends: 337 [2020-10-29 09:13:18,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:18,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-29 09:13:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 276. [2020-10-29 09:13:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-29 09:13:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 308 transitions. [2020-10-29 09:13:18,311 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 308 transitions. Word has length 43 [2020-10-29 09:13:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:18,312 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 308 transitions. [2020-10-29 09:13:18,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 308 transitions. [2020-10-29 09:13:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:13:18,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:18,313 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:18,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:13:18,314 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1281218203, now seen corresponding path program 2 times [2020-10-29 09:13:18,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:18,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916142669] [2020-10-29 09:13:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:18,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:19,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:19,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:13:19,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:19,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-29 09:13:19,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:19,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:19,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:19,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:19,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:13:19,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:19,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:19,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:19,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:19,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:19,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:19,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:19,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:19,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916142669] [2020-10-29 09:13:19,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:19,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:19,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000790064] [2020-10-29 09:13:19,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:19,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:19,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:19,741 INFO L87 Difference]: Start difference. First operand 276 states and 308 transitions. Second operand 16 states. [2020-10-29 09:13:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:21,254 INFO L93 Difference]: Finished difference Result 310 states and 345 transitions. [2020-10-29 09:13:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:13:21,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-29 09:13:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:21,258 INFO L225 Difference]: With dead ends: 310 [2020-10-29 09:13:21,258 INFO L226 Difference]: Without dead ends: 306 [2020-10-29 09:13:21,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:13:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-29 09:13:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 233. [2020-10-29 09:13:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-29 09:13:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 259 transitions. [2020-10-29 09:13:21,284 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 259 transitions. Word has length 43 [2020-10-29 09:13:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:21,284 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 259 transitions. [2020-10-29 09:13:21,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 259 transitions. [2020-10-29 09:13:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:13:21,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:21,285 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:21,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:13:21,286 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 276072595, now seen corresponding path program 5 times [2020-10-29 09:13:21,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:21,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27404058] [2020-10-29 09:13:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:21,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:21,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:22,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:22,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:13:22,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:22,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1415 [2020-10-29 09:13:22,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:22,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:13:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:13:22,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:23,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:23,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:23,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27404058] [2020-10-29 09:13:23,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:23,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:13:23,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443772345] [2020-10-29 09:13:23,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:13:23,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:23,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:13:23,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:13:23,114 INFO L87 Difference]: Start difference. First operand 233 states and 259 transitions. Second operand 14 states. [2020-10-29 09:13:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:24,246 INFO L93 Difference]: Finished difference Result 290 states and 320 transitions. [2020-10-29 09:13:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:13:24,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-29 09:13:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:24,253 INFO L225 Difference]: With dead ends: 290 [2020-10-29 09:13:24,253 INFO L226 Difference]: Without dead ends: 237 [2020-10-29 09:13:24,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:13:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-29 09:13:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2020-10-29 09:13:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-29 09:13:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 263 transitions. [2020-10-29 09:13:24,281 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 263 transitions. Word has length 45 [2020-10-29 09:13:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:24,281 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 263 transitions. [2020-10-29 09:13:24,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:13:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 263 transitions. [2020-10-29 09:13:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:13:24,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:24,282 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:24,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:13:24,282 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash 705474884, now seen corresponding path program 10 times [2020-10-29 09:13:24,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:24,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590932826] [2020-10-29 09:13:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:24,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:24,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:25,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:13:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:25,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:25,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:25,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:25,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:25,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:13:25,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:25,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:25,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:25,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590932826] [2020-10-29 09:13:25,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:25,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:25,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46647031] [2020-10-29 09:13:25,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:25,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:25,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:25,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:25,969 INFO L87 Difference]: Start difference. First operand 237 states and 263 transitions. Second operand 15 states. [2020-10-29 09:13:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:27,291 INFO L93 Difference]: Finished difference Result 252 states and 280 transitions. [2020-10-29 09:13:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:13:27,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-29 09:13:27,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:27,293 INFO L225 Difference]: With dead ends: 252 [2020-10-29 09:13:27,293 INFO L226 Difference]: Without dead ends: 182 [2020-10-29 09:13:27,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:13:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-29 09:13:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-29 09:13:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-29 09:13:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 205 transitions. [2020-10-29 09:13:27,328 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 205 transitions. Word has length 46 [2020-10-29 09:13:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:27,328 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 205 transitions. [2020-10-29 09:13:27,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 205 transitions. [2020-10-29 09:13:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:13:27,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:27,329 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:27,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:13:27,330 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:27,330 INFO L82 PathProgramCache]: Analyzing trace with hash 168052678, now seen corresponding path program 11 times [2020-10-29 09:13:27,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:27,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887233401] [2020-10-29 09:13:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:27,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:27,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:28,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:13:28,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:29,128 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-29 09:13:29,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:29,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:29,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:29,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887233401] [2020-10-29 09:13:29,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:29,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:29,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093032713] [2020-10-29 09:13:29,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:29,514 INFO L87 Difference]: Start difference. First operand 182 states and 205 transitions. Second operand 17 states. [2020-10-29 09:13:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:31,306 INFO L93 Difference]: Finished difference Result 319 states and 360 transitions. [2020-10-29 09:13:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:13:31,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-29 09:13:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:31,308 INFO L225 Difference]: With dead ends: 319 [2020-10-29 09:13:31,308 INFO L226 Difference]: Without dead ends: 306 [2020-10-29 09:13:31,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:13:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-29 09:13:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 246. [2020-10-29 09:13:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-29 09:13:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2020-10-29 09:13:31,348 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 46 [2020-10-29 09:13:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:31,348 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2020-10-29 09:13:31,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2020-10-29 09:13:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:13:31,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:31,349 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-29 09:13:31,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:13:31,349 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1554256072, now seen corresponding path program 12 times [2020-10-29 09:13:31,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:31,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931541434] [2020-10-29 09:13:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:31,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:31,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:13:32,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:33,084 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-29 09:13:33,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:33,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:33,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:33,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931541434] [2020-10-29 09:13:33,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:33,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:33,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619707959] [2020-10-29 09:13:33,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:33,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:33,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:33,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:33,671 INFO L87 Difference]: Start difference. First operand 246 states and 276 transitions. Second operand 17 states. [2020-10-29 09:13:34,537 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-29 09:13:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:36,412 INFO L93 Difference]: Finished difference Result 391 states and 443 transitions. [2020-10-29 09:13:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:13:36,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-29 09:13:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:36,414 INFO L225 Difference]: With dead ends: 391 [2020-10-29 09:13:36,414 INFO L226 Difference]: Without dead ends: 378 [2020-10-29 09:13:36,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:13:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-29 09:13:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 246. [2020-10-29 09:13:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-29 09:13:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2020-10-29 09:13:36,454 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 46 [2020-10-29 09:13:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:36,454 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2020-10-29 09:13:36,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2020-10-29 09:13:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:13:36,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:36,455 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:36,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:13:36,455 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash 980234498, now seen corresponding path program 13 times [2020-10-29 09:13:36,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:36,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571595246] [2020-10-29 09:13:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:36,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:36,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:37,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:37,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:13:37,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:37,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1422 [2020-10-29 09:13:37,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:37,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:37,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:13:37,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:38,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:38,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:38,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:38,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:38,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:38,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:38,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:38,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:38,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:38,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:38,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:38,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:38,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571595246] [2020-10-29 09:13:38,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:38,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:38,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635982125] [2020-10-29 09:13:38,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:38,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:38,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:38,348 INFO L87 Difference]: Start difference. First operand 246 states and 276 transitions. Second operand 15 states. [2020-10-29 09:13:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:39,488 INFO L93 Difference]: Finished difference Result 291 states and 327 transitions. [2020-10-29 09:13:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:13:39,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-29 09:13:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:39,491 INFO L225 Difference]: With dead ends: 291 [2020-10-29 09:13:39,491 INFO L226 Difference]: Without dead ends: 278 [2020-10-29 09:13:39,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:13:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-29 09:13:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 267. [2020-10-29 09:13:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-29 09:13:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 297 transitions. [2020-10-29 09:13:39,530 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 297 transitions. Word has length 46 [2020-10-29 09:13:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:39,531 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 297 transitions. [2020-10-29 09:13:39,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 297 transitions. [2020-10-29 09:13:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:13:39,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:39,532 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:39,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:13:39,532 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:39,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1170727778, now seen corresponding path program 2 times [2020-10-29 09:13:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:39,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392172307] [2020-10-29 09:13:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:40,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:40,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:13:40,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:40,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-29 09:13:40,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:40,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:40,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:40,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:40,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:13:40,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:40,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:40,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:40,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:40,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:40,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:40,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:40,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:40,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:40,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:40,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:40,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392172307] [2020-10-29 09:13:40,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:40,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:40,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679626324] [2020-10-29 09:13:40,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:40,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:40,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:40,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:40,949 INFO L87 Difference]: Start difference. First operand 267 states and 297 transitions. Second operand 16 states. [2020-10-29 09:13:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:42,722 INFO L93 Difference]: Finished difference Result 287 states and 320 transitions. [2020-10-29 09:13:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:13:42,723 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-29 09:13:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:42,725 INFO L225 Difference]: With dead ends: 287 [2020-10-29 09:13:42,725 INFO L226 Difference]: Without dead ends: 283 [2020-10-29 09:13:42,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-29 09:13:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 246. [2020-10-29 09:13:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-29 09:13:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2020-10-29 09:13:42,761 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 46 [2020-10-29 09:13:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:42,761 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2020-10-29 09:13:42,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2020-10-29 09:13:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:13:42,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:42,762 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-29 09:13:42,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-29 09:13:42,762 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash 442812292, now seen corresponding path program 14 times [2020-10-29 09:13:42,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:42,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640195453] [2020-10-29 09:13:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:43,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:13:43,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-29 09:13:43,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:43,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:13:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:43,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:13:43,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:44,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:44,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:44,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:44,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640195453] [2020-10-29 09:13:44,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:44,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:44,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325801520] [2020-10-29 09:13:44,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:44,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:44,378 INFO L87 Difference]: Start difference. First operand 246 states and 276 transitions. Second operand 17 states. [2020-10-29 09:13:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:46,203 INFO L93 Difference]: Finished difference Result 323 states and 364 transitions. [2020-10-29 09:13:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:13:46,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-29 09:13:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:46,205 INFO L225 Difference]: With dead ends: 323 [2020-10-29 09:13:46,205 INFO L226 Difference]: Without dead ends: 319 [2020-10-29 09:13:46,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:13:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-29 09:13:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 262. [2020-10-29 09:13:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-29 09:13:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 293 transitions. [2020-10-29 09:13:46,241 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 293 transitions. Word has length 46 [2020-10-29 09:13:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:46,242 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 293 transitions. [2020-10-29 09:13:46,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 293 transitions. [2020-10-29 09:13:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:13:46,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:46,243 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:46,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-29 09:13:46,243 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1427985870, now seen corresponding path program 3 times [2020-10-29 09:13:46,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:46,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702748950] [2020-10-29 09:13:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:46,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:46,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:47,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:13:47,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:47,773 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-29 09:13:47,906 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-29 09:13:48,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:48,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:48,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:48,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:48,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:48,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:48,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:48,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:48,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702748950] [2020-10-29 09:13:48,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:48,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:48,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867852669] [2020-10-29 09:13:48,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:48,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:48,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:48,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:48,404 INFO L87 Difference]: Start difference. First operand 262 states and 293 transitions. Second operand 16 states. [2020-10-29 09:13:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:49,785 INFO L93 Difference]: Finished difference Result 372 states and 412 transitions. [2020-10-29 09:13:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:13:49,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-29 09:13:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:49,788 INFO L225 Difference]: With dead ends: 372 [2020-10-29 09:13:49,788 INFO L226 Difference]: Without dead ends: 358 [2020-10-29 09:13:49,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:13:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-29 09:13:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 299. [2020-10-29 09:13:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-29 09:13:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 332 transitions. [2020-10-29 09:13:49,836 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 332 transitions. Word has length 46 [2020-10-29 09:13:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:49,837 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 332 transitions. [2020-10-29 09:13:49,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 332 transitions. [2020-10-29 09:13:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:13:49,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:49,838 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:49,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-29 09:13:49,838 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:49,839 INFO L82 PathProgramCache]: Analyzing trace with hash -41782476, now seen corresponding path program 4 times [2020-10-29 09:13:49,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:49,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163894202] [2020-10-29 09:13:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:49,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:51,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:51,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:13:51,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:51,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1400 [2020-10-29 09:13:51,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:51,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:51,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:13:51,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:52,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:52,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:52,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:52,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:52,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:52,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:52,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:52,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:52,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163894202] [2020-10-29 09:13:52,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:52,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:13:52,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494529636] [2020-10-29 09:13:52,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:13:52,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:52,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:13:52,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:13:52,189 INFO L87 Difference]: Start difference. First operand 299 states and 332 transitions. Second operand 16 states. [2020-10-29 09:13:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:53,555 INFO L93 Difference]: Finished difference Result 348 states and 386 transitions. [2020-10-29 09:13:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:13:53,563 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-29 09:13:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:53,564 INFO L225 Difference]: With dead ends: 348 [2020-10-29 09:13:53,564 INFO L226 Difference]: Without dead ends: 334 [2020-10-29 09:13:53,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:13:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-29 09:13:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 262. [2020-10-29 09:13:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-29 09:13:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 291 transitions. [2020-10-29 09:13:53,604 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 291 transitions. Word has length 46 [2020-10-29 09:13:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:53,604 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 291 transitions. [2020-10-29 09:13:53,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:13:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 291 transitions. [2020-10-29 09:13:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:53,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:53,605 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:53,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-29 09:13:53,606 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:53,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1967570524, now seen corresponding path program 15 times [2020-10-29 09:13:53,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:53,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076614619] [2020-10-29 09:13:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:53,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:54,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:13:54,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:55,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:55,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:55,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:55,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:55,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:55,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:55,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:55,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:55,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:55,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:55,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:55,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:55,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076614619] [2020-10-29 09:13:55,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:55,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:55,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295353700] [2020-10-29 09:13:55,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:55,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:55,043 INFO L87 Difference]: Start difference. First operand 262 states and 291 transitions. Second operand 17 states. [2020-10-29 09:13:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:57,071 INFO L93 Difference]: Finished difference Result 420 states and 462 transitions. [2020-10-29 09:13:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:13:57,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-29 09:13:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:57,074 INFO L225 Difference]: With dead ends: 420 [2020-10-29 09:13:57,075 INFO L226 Difference]: Without dead ends: 407 [2020-10-29 09:13:57,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:13:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-29 09:13:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 333. [2020-10-29 09:13:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-29 09:13:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 369 transitions. [2020-10-29 09:13:57,131 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 369 transitions. Word has length 48 [2020-10-29 09:13:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:57,131 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 369 transitions. [2020-10-29 09:13:57,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:13:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 369 transitions. [2020-10-29 09:13:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:57,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:57,132 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:57,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-29 09:13:57,133 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 83413474, now seen corresponding path program 6 times [2020-10-29 09:13:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:57,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786499049] [2020-10-29 09:13:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:57,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:57,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:57,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:57,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:57,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-29 09:13:57,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:57,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:57,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:13:57,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:58,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:58,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:58,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:58,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:58,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:58,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:58,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:58,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:58,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:58,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:58,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:58,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786499049] [2020-10-29 09:13:58,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:58,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:13:58,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755632166] [2020-10-29 09:13:58,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:13:58,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:58,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:13:58,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:58,782 INFO L87 Difference]: Start difference. First operand 333 states and 369 transitions. Second operand 17 states. [2020-10-29 09:14:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:01,229 INFO L93 Difference]: Finished difference Result 486 states and 540 transitions. [2020-10-29 09:14:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:14:01,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-29 09:14:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:01,232 INFO L225 Difference]: With dead ends: 486 [2020-10-29 09:14:01,232 INFO L226 Difference]: Without dead ends: 482 [2020-10-29 09:14:01,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:14:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-10-29 09:14:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 378. [2020-10-29 09:14:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-29 09:14:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 416 transitions. [2020-10-29 09:14:01,281 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 416 transitions. Word has length 48 [2020-10-29 09:14:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:01,282 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 416 transitions. [2020-10-29 09:14:01,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:14:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 416 transitions. [2020-10-29 09:14:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:14:01,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:01,283 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2020-10-29 09:14:01,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-29 09:14:01,283 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:01,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1869970705, now seen corresponding path program 16 times [2020-10-29 09:14:01,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:01,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520465663] [2020-10-29 09:14:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:01,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:02,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:04,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:04,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:14:04,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:14:04,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3065 [2020-10-29 09:14:04,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:04,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:04,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:14:04,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:04,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:14:04,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:04,686 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 09:14:04,833 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-29 09:14:05,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:05,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:05,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:05,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:05,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:05,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:05,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:05,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:05,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:05,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:05,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:05,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:05,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520465663] [2020-10-29 09:14:05,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:05,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:14:05,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448720003] [2020-10-29 09:14:05,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:14:05,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:14:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:14:05,250 INFO L87 Difference]: Start difference. First operand 378 states and 416 transitions. Second operand 17 states. [2020-10-29 09:14:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:06,841 INFO L93 Difference]: Finished difference Result 491 states and 541 transitions. [2020-10-29 09:14:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:14:06,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-29 09:14:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:06,845 INFO L225 Difference]: With dead ends: 491 [2020-10-29 09:14:06,845 INFO L226 Difference]: Without dead ends: 478 [2020-10-29 09:14:06,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:14:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-29 09:14:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 442. [2020-10-29 09:14:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-29 09:14:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 486 transitions. [2020-10-29 09:14:06,930 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 486 transitions. Word has length 49 [2020-10-29 09:14:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:06,930 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 486 transitions. [2020-10-29 09:14:06,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:14:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 486 transitions. [2020-10-29 09:14:06,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:14:06,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:06,932 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:06,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-29 09:14:06,932 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash -280991571, now seen corresponding path program 5 times [2020-10-29 09:14:06,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:06,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219009182] [2020-10-29 09:14:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:07,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:07,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:07,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:14:07,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:07,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-29 09:14:07,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:07,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:07,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:14:07,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:07,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:14:07,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:08,180 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-29 09:14:08,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:08,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:08,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:08,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:08,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:08,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:08,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:08,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:08,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:08,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:08,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:08,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:08,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219009182] [2020-10-29 09:14:08,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:08,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:14:08,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129176881] [2020-10-29 09:14:08,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:14:08,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:08,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:14:08,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:14:08,597 INFO L87 Difference]: Start difference. First operand 442 states and 486 transitions. Second operand 18 states. [2020-10-29 09:14:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:11,265 INFO L93 Difference]: Finished difference Result 487 states and 534 transitions. [2020-10-29 09:14:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:14:11,266 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-29 09:14:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:11,268 INFO L225 Difference]: With dead ends: 487 [2020-10-29 09:14:11,268 INFO L226 Difference]: Without dead ends: 483 [2020-10-29 09:14:11,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:14:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-29 09:14:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 387. [2020-10-29 09:14:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-29 09:14:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 431 transitions. [2020-10-29 09:14:11,317 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 431 transitions. Word has length 49 [2020-10-29 09:14:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:11,317 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 431 transitions. [2020-10-29 09:14:11,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:14:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 431 transitions. [2020-10-29 09:14:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:14:11,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:11,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:11,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-29 09:14:11,319 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:11,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2144730319, now seen corresponding path program 17 times [2020-10-29 09:14:11,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:11,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447742042] [2020-10-29 09:14:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:11,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:11,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:12,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:16,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4625 [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:14:16,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:16,285 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 09:14:16,441 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-29 09:14:16,594 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-29 09:14:16,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:16,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:16,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:16,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:16,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:14:16,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:16,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:16,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447742042] [2020-10-29 09:14:16,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:16,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:14:16,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269688246] [2020-10-29 09:14:16,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:14:16,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:14:16,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:14:16,914 INFO L87 Difference]: Start difference. First operand 387 states and 431 transitions. Second operand 17 states. [2020-10-29 09:14:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:18,517 INFO L93 Difference]: Finished difference Result 503 states and 559 transitions. [2020-10-29 09:14:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:14:18,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-29 09:14:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:18,520 INFO L225 Difference]: With dead ends: 503 [2020-10-29 09:14:18,520 INFO L226 Difference]: Without dead ends: 490 [2020-10-29 09:14:18,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:14:18,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-29 09:14:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 451. [2020-10-29 09:14:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-29 09:14:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 501 transitions. [2020-10-29 09:14:18,578 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 501 transitions. Word has length 49 [2020-10-29 09:14:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:18,578 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 501 transitions. [2020-10-29 09:14:18,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:14:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 501 transitions. [2020-10-29 09:14:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:14:18,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:18,579 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:18,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-29 09:14:18,579 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash -6231957, now seen corresponding path program 6 times [2020-10-29 09:14:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:18,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266950253] [2020-10-29 09:14:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:18,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:19,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:19,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:14:19,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:19,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-29 09:14:19,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:19,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:14:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:19,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:14:19,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:19,890 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-29 09:14:20,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:20,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:20,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:20,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:20,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:20,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:20,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:20,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:20,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266950253] [2020-10-29 09:14:20,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:20,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:14:20,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429978679] [2020-10-29 09:14:20,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:14:20,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:20,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:14:20,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:14:20,361 INFO L87 Difference]: Start difference. First operand 451 states and 501 transitions. Second operand 18 states. [2020-10-29 09:14:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:22,708 INFO L93 Difference]: Finished difference Result 563 states and 622 transitions. [2020-10-29 09:14:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:14:22,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-29 09:14:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:22,712 INFO L225 Difference]: With dead ends: 563 [2020-10-29 09:14:22,712 INFO L226 Difference]: Without dead ends: 559 [2020-10-29 09:14:22,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:14:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-10-29 09:14:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 451. [2020-10-29 09:14:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-29 09:14:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 501 transitions. [2020-10-29 09:14:22,769 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 501 transitions. Word has length 49 [2020-10-29 09:14:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:22,769 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 501 transitions. [2020-10-29 09:14:22,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:14:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 501 transitions. [2020-10-29 09:14:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:14:22,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:22,770 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:22,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-29 09:14:22,770 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash -563678647, now seen corresponding path program 18 times [2020-10-29 09:14:22,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:22,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872029309] [2020-10-29 09:14:22,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:22,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:23,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:24,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:24,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:14:24,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1360 [2020-10-29 09:14:24,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:24,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:14:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:14:24,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:24,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:24,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:24,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:24,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872029309] [2020-10-29 09:14:24,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:24,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:14:24,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737066667] [2020-10-29 09:14:24,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:14:24,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:14:24,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:14:24,759 INFO L87 Difference]: Start difference. First operand 451 states and 501 transitions. Second operand 16 states. [2020-10-29 09:14:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:26,618 INFO L93 Difference]: Finished difference Result 526 states and 578 transitions. [2020-10-29 09:14:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:14:26,619 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-29 09:14:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:26,622 INFO L225 Difference]: With dead ends: 526 [2020-10-29 09:14:26,622 INFO L226 Difference]: Without dead ends: 451 [2020-10-29 09:14:26,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:14:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-29 09:14:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2020-10-29 09:14:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-29 09:14:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 498 transitions. [2020-10-29 09:14:26,705 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 498 transitions. Word has length 51 [2020-10-29 09:14:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:26,705 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 498 transitions. [2020-10-29 09:14:26,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:14:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 498 transitions. [2020-10-29 09:14:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:14:26,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:26,706 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:26,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-29 09:14:26,706 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:26,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1713721073, now seen corresponding path program 19 times [2020-10-29 09:14:26,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:26,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76274286] [2020-10-29 09:14:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:26,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:27,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:28,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:28,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:14:28,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1646 [2020-10-29 09:14:28,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:28,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:14:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:14:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:28,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:28,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:28,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:28,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:28,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:28,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:28,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:28,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:28,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:28,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:28,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:28,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:28,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76274286] [2020-10-29 09:14:28,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:28,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:14:28,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447892272] [2020-10-29 09:14:28,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:14:28,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:14:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:14:28,995 INFO L87 Difference]: Start difference. First operand 451 states and 498 transitions. Second operand 17 states. [2020-10-29 09:14:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:30,943 INFO L93 Difference]: Finished difference Result 466 states and 515 transitions. [2020-10-29 09:14:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:14:30,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-29 09:14:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:30,946 INFO L225 Difference]: With dead ends: 466 [2020-10-29 09:14:30,946 INFO L226 Difference]: Without dead ends: 355 [2020-10-29 09:14:30,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:14:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-29 09:14:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2020-10-29 09:14:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-29 09:14:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 397 transitions. [2020-10-29 09:14:30,989 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 397 transitions. Word has length 51 [2020-10-29 09:14:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:30,989 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 397 transitions. [2020-10-29 09:14:30,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:14:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 397 transitions. [2020-10-29 09:14:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:14:30,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:30,990 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:30,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-29 09:14:30,991 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:30,991 INFO L82 PathProgramCache]: Analyzing trace with hash 236298995, now seen corresponding path program 20 times [2020-10-29 09:14:30,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:30,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331647352] [2020-10-29 09:14:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:31,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:31,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:32,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1914 [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:14:32,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:33,595 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-29 09:14:33,759 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-29 09:14:34,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:34,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:34,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:34,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:34,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:34,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:14:34,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:34,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:34,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:34,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:34,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:34,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:34,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331647352] [2020-10-29 09:14:34,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:34,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:14:34,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253908553] [2020-10-29 09:14:34,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:14:34,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:34,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:14:34,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:14:34,332 INFO L87 Difference]: Start difference. First operand 355 states and 397 transitions. Second operand 19 states. [2020-10-29 09:14:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:36,859 INFO L93 Difference]: Finished difference Result 561 states and 624 transitions. [2020-10-29 09:14:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:14:36,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-29 09:14:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:36,862 INFO L225 Difference]: With dead ends: 561 [2020-10-29 09:14:36,862 INFO L226 Difference]: Without dead ends: 548 [2020-10-29 09:14:36,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:14:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-29 09:14:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 466. [2020-10-29 09:14:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-29 09:14:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 519 transitions. [2020-10-29 09:14:36,935 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 519 transitions. Word has length 51 [2020-10-29 09:14:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:36,935 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 519 transitions. [2020-10-29 09:14:36,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:14:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 519 transitions. [2020-10-29 09:14:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:14:36,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:36,936 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:36,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-29 09:14:36,936 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2007684303, now seen corresponding path program 21 times [2020-10-29 09:14:36,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:36,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833320972] [2020-10-29 09:14:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:37,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:37,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:39,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:39,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:14:39,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:39,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2235 [2020-10-29 09:14:39,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:39,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:14:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:39,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:14:39,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:39,629 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:14:39,800 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-29 09:14:39,981 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-29 09:14:40,125 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 09:14:40,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:40,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:40,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:40,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:40,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833320972] [2020-10-29 09:14:40,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:40,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:14:40,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710667394] [2020-10-29 09:14:40,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:14:40,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:40,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:14:40,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:14:40,767 INFO L87 Difference]: Start difference. First operand 466 states and 519 transitions. Second operand 19 states. [2020-10-29 09:14:41,315 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-29 09:14:41,934 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-29 09:14:42,264 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-29 09:14:42,503 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-29 09:14:42,777 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-29 09:14:43,123 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-29 09:14:43,570 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-29 09:14:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:45,567 INFO L93 Difference]: Finished difference Result 668 states and 753 transitions. [2020-10-29 09:14:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:14:45,568 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-29 09:14:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:45,570 INFO L225 Difference]: With dead ends: 668 [2020-10-29 09:14:45,570 INFO L226 Difference]: Without dead ends: 655 [2020-10-29 09:14:45,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:14:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-10-29 09:14:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 466. [2020-10-29 09:14:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-29 09:14:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 519 transitions. [2020-10-29 09:14:45,629 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 519 transitions. Word has length 51 [2020-10-29 09:14:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:45,629 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 519 transitions. [2020-10-29 09:14:45,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:14:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 519 transitions. [2020-10-29 09:14:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:14:45,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:45,630 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:45,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-29 09:14:45,630 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1921714701, now seen corresponding path program 7 times [2020-10-29 09:14:45,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:45,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483170494] [2020-10-29 09:14:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:45,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:46,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:48,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:48,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:14:48,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:14:48,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2324 [2020-10-29 09:14:48,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:48,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:14:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:48,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:14:48,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:48,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:48,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:48,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:48,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:48,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483170494] [2020-10-29 09:14:48,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:48,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:14:48,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069689093] [2020-10-29 09:14:48,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:14:48,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:14:48,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:14:48,659 INFO L87 Difference]: Start difference. First operand 466 states and 519 transitions. Second operand 17 states. [2020-10-29 09:14:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:50,450 INFO L93 Difference]: Finished difference Result 527 states and 586 transitions. [2020-10-29 09:14:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:14:50,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-29 09:14:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:50,454 INFO L225 Difference]: With dead ends: 527 [2020-10-29 09:14:50,454 INFO L226 Difference]: Without dead ends: 514 [2020-10-29 09:14:50,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:14:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-10-29 09:14:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 466. [2020-10-29 09:14:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-29 09:14:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 519 transitions. [2020-10-29 09:14:50,539 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 519 transitions. Word has length 51 [2020-10-29 09:14:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:50,539 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 519 transitions. [2020-10-29 09:14:50,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:14:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 519 transitions. [2020-10-29 09:14:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:14:50,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:50,540 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:50,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-29 09:14:50,540 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash 222290319, now seen corresponding path program 3 times [2020-10-29 09:14:50,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:50,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125315762] [2020-10-29 09:14:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:50,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:51,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:51,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:14:51,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:51,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-29 09:14:51,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:51,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:51,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:14:51,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:51,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:14:51,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:52,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:52,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:52,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:52,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:52,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:14:52,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:52,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:52,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125315762] [2020-10-29 09:14:52,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:52,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:14:52,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710946223] [2020-10-29 09:14:52,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:14:52,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:14:52,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:14:52,279 INFO L87 Difference]: Start difference. First operand 466 states and 519 transitions. Second operand 18 states. [2020-10-29 09:14:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:54,666 INFO L93 Difference]: Finished difference Result 523 states and 579 transitions. [2020-10-29 09:14:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:14:54,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-29 09:14:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:54,669 INFO L225 Difference]: With dead ends: 523 [2020-10-29 09:14:54,670 INFO L226 Difference]: Without dead ends: 519 [2020-10-29 09:14:54,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:14:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-29 09:14:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 466. [2020-10-29 09:14:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-29 09:14:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 519 transitions. [2020-10-29 09:14:54,759 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 519 transitions. Word has length 51 [2020-10-29 09:14:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:54,759 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 519 transitions. [2020-10-29 09:14:54,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:14:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 519 transitions. [2020-10-29 09:14:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:14:54,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:54,760 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:54,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-29 09:14:54,760 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash 895830517, now seen corresponding path program 22 times [2020-10-29 09:14:54,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:54,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841634597] [2020-10-29 09:14:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:54,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:55,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:14:55,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:56,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:14:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:14:56,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:14:56,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:14:56,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:14:56,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:14:56,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:14:56,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:14:56,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:14:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:14:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:14:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:14:56,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:14:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:14:56,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841634597] [2020-10-29 09:14:56,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:14:56,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:14:56,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173994979] [2020-10-29 09:14:56,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:14:56,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:14:56,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:14:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:14:56,936 INFO L87 Difference]: Start difference. First operand 466 states and 519 transitions. Second operand 19 states. [2020-10-29 09:14:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:14:59,825 INFO L93 Difference]: Finished difference Result 761 states and 846 transitions. [2020-10-29 09:14:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:14:59,826 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-29 09:14:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:14:59,829 INFO L225 Difference]: With dead ends: 761 [2020-10-29 09:14:59,829 INFO L226 Difference]: Without dead ends: 757 [2020-10-29 09:14:59,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:14:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-10-29 09:14:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 571. [2020-10-29 09:14:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-10-29 09:14:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 640 transitions. [2020-10-29 09:14:59,907 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 640 transitions. Word has length 51 [2020-10-29 09:14:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:14:59,907 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 640 transitions. [2020-10-29 09:14:59,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:14:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 640 transitions. [2020-10-29 09:14:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:14:59,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:14:59,908 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:14:59,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-29 09:14:59,919 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:14:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:14:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1348152781, now seen corresponding path program 8 times [2020-10-29 09:14:59,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:14:59,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690960299] [2020-10-29 09:14:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:14:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:01,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:01,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:15:01,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:01,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-29 09:15:01,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:01,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:01,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:15:01,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:01,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:15:01,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:01,596 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-29 09:15:01,896 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-29 09:15:02,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:02,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:02,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:02,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:02,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:02,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:15:02,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:02,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:02,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690960299] [2020-10-29 09:15:02,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:02,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:15:02,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236543200] [2020-10-29 09:15:02,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:15:02,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:15:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:15:02,311 INFO L87 Difference]: Start difference. First operand 571 states and 640 transitions. Second operand 18 states. [2020-10-29 09:15:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:04,764 INFO L93 Difference]: Finished difference Result 691 states and 768 transitions. [2020-10-29 09:15:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:15:04,764 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-29 09:15:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:04,766 INFO L225 Difference]: With dead ends: 691 [2020-10-29 09:15:04,766 INFO L226 Difference]: Without dead ends: 687 [2020-10-29 09:15:04,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:15:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-10-29 09:15:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 495. [2020-10-29 09:15:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-29 09:15:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 549 transitions. [2020-10-29 09:15:04,850 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 549 transitions. Word has length 51 [2020-10-29 09:15:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:04,851 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 549 transitions. [2020-10-29 09:15:04,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:15:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 549 transitions. [2020-10-29 09:15:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:15:04,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:04,852 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:04,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-29 09:15:04,852 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1658440448, now seen corresponding path program 7 times [2020-10-29 09:15:04,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:04,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386809747] [2020-10-29 09:15:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:04,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:05,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:15:06,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:06,936 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-29 09:15:07,072 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-29 09:15:07,205 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-29 09:15:07,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:07,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:07,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:07,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 09:15:07,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:07,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:07,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:07,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:07,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386809747] [2020-10-29 09:15:07,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:07,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:15:07,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573436586] [2020-10-29 09:15:07,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:15:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:07,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:15:07,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:15:07,746 INFO L87 Difference]: Start difference. First operand 495 states and 549 transitions. Second operand 18 states. [2020-10-29 09:15:08,702 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-29 09:15:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:10,114 INFO L93 Difference]: Finished difference Result 699 states and 775 transitions. [2020-10-29 09:15:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:15:10,115 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-29 09:15:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:10,119 INFO L225 Difference]: With dead ends: 699 [2020-10-29 09:15:10,119 INFO L226 Difference]: Without dead ends: 685 [2020-10-29 09:15:10,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:15:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-10-29 09:15:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 556. [2020-10-29 09:15:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-10-29 09:15:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 613 transitions. [2020-10-29 09:15:10,205 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 613 transitions. Word has length 52 [2020-10-29 09:15:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:10,205 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 613 transitions. [2020-10-29 09:15:10,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:15:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 613 transitions. [2020-10-29 09:15:10,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:15:10,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:10,206 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:10,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-29 09:15:10,206 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:10,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1383680834, now seen corresponding path program 8 times [2020-10-29 09:15:10,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:10,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044653033] [2020-10-29 09:15:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:10,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:10,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1894 [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:15:12,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:12,660 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-29 09:15:12,797 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-29 09:15:12,975 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-29 09:15:13,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:13,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:13,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:13,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:13,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:13,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:15:13,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:13,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:13,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044653033] [2020-10-29 09:15:13,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:13,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:15:13,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821867519] [2020-10-29 09:15:13,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:15:13,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:15:13,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:15:13,367 INFO L87 Difference]: Start difference. First operand 556 states and 613 transitions. Second operand 18 states. [2020-10-29 09:15:14,451 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-29 09:15:14,793 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-29 09:15:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:15,893 INFO L93 Difference]: Finished difference Result 622 states and 684 transitions. [2020-10-29 09:15:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:15:15,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-29 09:15:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:15,897 INFO L225 Difference]: With dead ends: 622 [2020-10-29 09:15:15,897 INFO L226 Difference]: Without dead ends: 608 [2020-10-29 09:15:15,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:15:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-10-29 09:15:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 495. [2020-10-29 09:15:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-29 09:15:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 547 transitions. [2020-10-29 09:15:15,964 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 547 transitions. Word has length 52 [2020-10-29 09:15:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:15,964 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 547 transitions. [2020-10-29 09:15:15,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:15:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 547 transitions. [2020-10-29 09:15:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:15:15,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:15,965 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:15,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-29 09:15:15,966 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1607167550, now seen corresponding path program 9 times [2020-10-29 09:15:15,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:15,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241815412] [2020-10-29 09:15:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:16,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:16,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:15:16,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:17,253 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:15:17,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:17,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:17,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:17,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:17,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:17,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:15:17,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:17,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:17,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:17,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:17,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:17,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:17,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241815412] [2020-10-29 09:15:17,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:17,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:15:17,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837873753] [2020-10-29 09:15:17,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:15:17,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:15:17,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:15:17,949 INFO L87 Difference]: Start difference. First operand 495 states and 547 transitions. Second operand 19 states. [2020-10-29 09:15:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:21,018 INFO L93 Difference]: Finished difference Result 629 states and 693 transitions. [2020-10-29 09:15:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:15:21,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-29 09:15:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:21,022 INFO L225 Difference]: With dead ends: 629 [2020-10-29 09:15:21,022 INFO L226 Difference]: Without dead ends: 625 [2020-10-29 09:15:21,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:15:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-10-29 09:15:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 504. [2020-10-29 09:15:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-29 09:15:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 562 transitions. [2020-10-29 09:15:21,085 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 562 transitions. Word has length 52 [2020-10-29 09:15:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:21,085 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 562 transitions. [2020-10-29 09:15:21,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:15:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 562 transitions. [2020-10-29 09:15:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:15:21,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:21,086 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:21,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-29 09:15:21,087 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:21,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1881927164, now seen corresponding path program 10 times [2020-10-29 09:15:21,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:21,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215909545] [2020-10-29 09:15:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:21,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1064 [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:15:22,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:22,552 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-29 09:15:22,732 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-29 09:15:23,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:15:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:23,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:15:23,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:15:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:15:23,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215909545] [2020-10-29 09:15:23,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:15:23,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:15:23,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456284331] [2020-10-29 09:15:23,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:15:23,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:15:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:15:23,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:15:23,341 INFO L87 Difference]: Start difference. First operand 504 states and 562 transitions. Second operand 19 states. [2020-10-29 09:15:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:15:26,256 INFO L93 Difference]: Finished difference Result 632 states and 699 transitions. [2020-10-29 09:15:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:15:26,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-29 09:15:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:15:26,260 INFO L225 Difference]: With dead ends: 632 [2020-10-29 09:15:26,260 INFO L226 Difference]: Without dead ends: 628 [2020-10-29 09:15:26,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:15:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-10-29 09:15:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 504. [2020-10-29 09:15:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-29 09:15:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 562 transitions. [2020-10-29 09:15:26,328 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 562 transitions. Word has length 52 [2020-10-29 09:15:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:15:26,329 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 562 transitions. [2020-10-29 09:15:26,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:15:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 562 transitions. [2020-10-29 09:15:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:15:26,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:15:26,330 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:15:26,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-29 09:15:26,330 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:15:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:15:26,331 INFO L82 PathProgramCache]: Analyzing trace with hash 763162048, now seen corresponding path program 11 times [2020-10-29 09:15:26,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:15:26,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862823206] [2020-10-29 09:15:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:15:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:15:26,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking...