/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-sorted-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:08:35,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:08:35,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:08:35,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:08:35,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:08:35,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:08:35,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:08:35,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:08:35,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:08:35,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:08:35,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:08:35,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:08:35,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:08:35,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:08:35,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:08:35,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:08:35,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:08:35,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:08:35,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:08:35,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:08:35,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:08:35,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:08:35,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:08:35,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:08:35,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:08:35,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:08:35,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:08:35,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:08:35,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:08:35,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:08:35,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:08:35,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:08:35,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:08:35,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:08:35,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:08:35,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:08:35,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:08:35,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:08:35,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:08:35,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:08:35,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:08:35,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:08:35,499 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:08:35,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:08:35,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:08:35,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:08:35,504 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:08:35,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:08:35,505 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:08:35,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:08:35,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:08:35,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:08:35,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:08:35,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:08:35,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:08:35,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:08:35,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:08:35,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:08:35,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:08:35,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:08:35,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:08:35,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:08:35,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:08:35,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:08:35,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:08:35,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:08:35,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:08:35,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:08:35,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:08:35,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:08:35,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:08:35,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:08:35,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:08:36,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:08:36,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:08:36,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:08:36,054 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:08:36,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-sorted-1.i [2020-10-27 01:08:36,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0d79f156/e9d37287dfcf44dd8c688e6f62da61de/FLAG6e1aaf31d [2020-10-27 01:08:36,975 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:08:36,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-sorted-1.i [2020-10-27 01:08:37,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0d79f156/e9d37287dfcf44dd8c688e6f62da61de/FLAG6e1aaf31d [2020-10-27 01:08:37,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0d79f156/e9d37287dfcf44dd8c688e6f62da61de [2020-10-27 01:08:37,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:08:37,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:08:37,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:08:37,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:08:37,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:08:37,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:37,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2509bb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37, skipping insertion in model container [2020-10-27 01:08:37,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:37,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:08:37,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:08:37,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:08:37,883 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:08:37,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:08:37,997 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:08:37,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37 WrapperNode [2020-10-27 01:08:37,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:08:38,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:08:38,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:08:38,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:08:38,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:38,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:38,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:38,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:38,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:38,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:38,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (1/1) ... [2020-10-27 01:08:38,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:08:38,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:08:38,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:08:38,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:08:38,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:08:38,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:08:38,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:08:38,173 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:08:38,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:08:38,174 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:08:38,174 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:08:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:08:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:08:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:08:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:08:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:08:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:08:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:08:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:08:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:08:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:08:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:08:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:08:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:08:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:08:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:08:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:08:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:08:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:08:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:08:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:08:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:08:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:08:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:08:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:08:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:08:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:08:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:08:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:08:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:08:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:08:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:08:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:08:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:08:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:08:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:08:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:08:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:08:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:08:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:08:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:08:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:08:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:08:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:08:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:08:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:08:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:08:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:08:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:08:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:08:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:08:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:08:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:08:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:08:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:08:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:08:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:08:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:08:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:08:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:08:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:08:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:08:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:08:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:08:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:08:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:08:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:08:38,192 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:08:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:08:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:08:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:08:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:08:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:08:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:08:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:08:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:08:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:08:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:08:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:08:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:08:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:08:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:08:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:08:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:08:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:08:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:08:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:08:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:08:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:08:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:08:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:08:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:08:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:08:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:08:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:08:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:08:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:08:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:08:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:08:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:08:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:08:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:08:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:08:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:08:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:08:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:08:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:08:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:08:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:08:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:08:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:08:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:08:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:08:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:08:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:08:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:08:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:08:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:08:38,886 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:08:38,887 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-27 01:08:38,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:08:38 BoogieIcfgContainer [2020-10-27 01:08:38,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:08:38,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:08:38,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:08:38,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:08:38,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:08:37" (1/3) ... [2020-10-27 01:08:38,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c89f23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:08:38, skipping insertion in model container [2020-10-27 01:08:38,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:08:37" (2/3) ... [2020-10-27 01:08:38,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c89f23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:08:38, skipping insertion in model container [2020-10-27 01:08:38,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:08:38" (3/3) ... [2020-10-27 01:08:38,899 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-sorted-1.i [2020-10-27 01:08:38,911 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:08:38,917 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:08:38,931 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:08:38,960 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:08:38,960 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:08:38,960 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:08:38,961 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:08:38,961 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:08:38,961 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:08:38,961 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:08:38,961 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:08:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-27 01:08:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:08:38,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:38,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:38,988 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1889217750, now seen corresponding path program 1 times [2020-10-27 01:08:39,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:39,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076777877] [2020-10-27 01:08:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:39,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:39,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 01:08:39,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:39,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-27 01:08:39,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:39,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:08:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:39,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:08:39,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:08:39,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:39,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:39,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:39,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:39,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:08:39,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:39,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076777877] [2020-10-27 01:08:39,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:08:39,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:08:39,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736349665] [2020-10-27 01:08:39,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:08:39,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:08:39,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:08:39,807 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-10-27 01:08:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:40,179 INFO L93 Difference]: Finished difference Result 147 states and 257 transitions. [2020-10-27 01:08:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:08:40,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-27 01:08:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:40,191 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:08:40,192 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:08:40,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:08:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:08:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-10-27 01:08:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:08:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-10-27 01:08:40,248 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 12 [2020-10-27 01:08:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:40,249 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-10-27 01:08:40,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:08:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-10-27 01:08:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:08:40,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:40,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:40,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:08:40,251 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash -825144030, now seen corresponding path program 1 times [2020-10-27 01:08:40,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:40,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989152861] [2020-10-27 01:08:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:40,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:40,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:40,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:40,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:40,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:08:40,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:40,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-27 01:08:40,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:40,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:08:40,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:40,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:08:40,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:40,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:40,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:40,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:40,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:40,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:08:40,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:40,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989152861] [2020-10-27 01:08:40,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:08:40,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:08:40,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742243036] [2020-10-27 01:08:40,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:08:40,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:40,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:08:40,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:08:40,990 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 4 states. [2020-10-27 01:08:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:41,197 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2020-10-27 01:08:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:08:41,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 01:08:41,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:41,199 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:08:41,199 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:08:41,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:08:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:08:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 01:08:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:08:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-10-27 01:08:41,214 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2020-10-27 01:08:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:41,214 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-10-27 01:08:41,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:08:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-10-27 01:08:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:08:41,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:41,216 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:41,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:08:41,217 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash -911494601, now seen corresponding path program 1 times [2020-10-27 01:08:41,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:41,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764745288] [2020-10-27 01:08:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:41,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:41,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:08:41,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:41,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 01:08:41,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:08:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:08:41,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:41,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:41,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:41,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:41,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:41,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:41,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:08:41,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:41,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:41,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:41,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:41,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:41,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764745288] [2020-10-27 01:08:41,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:41,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:08:41,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348971782] [2020-10-27 01:08:41,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:08:41,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:41,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:08:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:08:41,773 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 9 states. [2020-10-27 01:08:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:42,381 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2020-10-27 01:08:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:08:42,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:08:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:42,384 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:08:42,384 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:08:42,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:08:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-27 01:08:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:08:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2020-10-27 01:08:42,414 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 27 [2020-10-27 01:08:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:42,415 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2020-10-27 01:08:42,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:08:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2020-10-27 01:08:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:08:42,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:42,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:42,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:08:42,417 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1161269986, now seen corresponding path program 1 times [2020-10-27 01:08:42,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:42,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037790667] [2020-10-27 01:08:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:42,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:42,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:43,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:43,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:08:43,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:43,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-27 01:08:43,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:43,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:08:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:08:43,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:43,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:43,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:43,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:43,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:43,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:43,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:08:43,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:43,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:43,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:43,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:43,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:43,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037790667] [2020-10-27 01:08:43,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:43,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:08:43,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503930497] [2020-10-27 01:08:43,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:08:43,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:08:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:08:43,803 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand 8 states. [2020-10-27 01:08:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:44,248 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2020-10-27 01:08:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:08:44,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 01:08:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:44,250 INFO L225 Difference]: With dead ends: 121 [2020-10-27 01:08:44,250 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:08:44,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:08:44,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-27 01:08:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:08:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-27 01:08:44,263 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 30 [2020-10-27 01:08:44,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:44,263 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-27 01:08:44,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:08:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-27 01:08:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:08:44,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:44,265 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:44,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:08:44,265 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1694431754, now seen corresponding path program 1 times [2020-10-27 01:08:44,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:44,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577678748] [2020-10-27 01:08:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:44,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:44,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:44,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:44,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:08:44,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:44,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-27 01:08:44,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:44,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:08:44,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:44,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:08:44,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:44,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:44,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:44,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:44,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:44,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:44,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:44,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:44,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:44,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:44,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:44,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577678748] [2020-10-27 01:08:44,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:44,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:08:44,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104907068] [2020-10-27 01:08:44,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:08:44,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:08:44,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:08:44,936 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 10 states. [2020-10-27 01:08:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:45,484 INFO L93 Difference]: Finished difference Result 163 states and 212 transitions. [2020-10-27 01:08:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:08:45,487 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 01:08:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:45,489 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:08:45,489 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:08:45,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:45,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:08:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 87. [2020-10-27 01:08:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:08:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2020-10-27 01:08:45,502 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 31 [2020-10-27 01:08:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:45,503 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2020-10-27 01:08:45,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:08:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2020-10-27 01:08:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:08:45,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:45,504 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:45,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:08:45,505 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1301404744, now seen corresponding path program 1 times [2020-10-27 01:08:45,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:45,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543931019] [2020-10-27 01:08:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:45,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:45,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:45,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:45,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:45,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:46,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:46,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:08:46,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:08:46,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-27 01:08:46,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:08:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:46,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:08:46,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:46,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:46,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:46,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:46,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:46,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:46,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:46,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:46,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:46,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:46,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:46,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:46,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543931019] [2020-10-27 01:08:46,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:46,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:08:46,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489906674] [2020-10-27 01:08:46,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:08:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:08:46,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:08:46,515 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 9 states. [2020-10-27 01:08:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:46,948 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2020-10-27 01:08:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:08:46,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 01:08:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:46,951 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:08:46,951 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:08:46,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:08:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2020-10-27 01:08:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:08:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-10-27 01:08:46,981 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 31 [2020-10-27 01:08:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:46,982 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-10-27 01:08:46,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:08:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-10-27 01:08:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:08:46,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:46,985 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:46,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:08:46,985 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1475577036, now seen corresponding path program 2 times [2020-10-27 01:08:46,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:46,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120504017] [2020-10-27 01:08:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:47,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:47,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:08:47,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:47,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 01:08:47,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:47,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:08:47,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:47,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:08:47,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:47,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:47,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:47,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:47,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:47,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:47,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:47,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:47,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:47,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120504017] [2020-10-27 01:08:47,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:47,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:47,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734338523] [2020-10-27 01:08:47,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:47,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:47,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:47,655 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 11 states. [2020-10-27 01:08:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:48,394 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2020-10-27 01:08:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:48,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:08:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:48,395 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:08:48,396 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 01:08:48,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 01:08:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 100. [2020-10-27 01:08:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:08:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2020-10-27 01:08:48,419 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 31 [2020-10-27 01:08:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:48,419 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2020-10-27 01:08:48,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2020-10-27 01:08:48,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:08:48,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:48,423 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:48,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:08:48,423 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:48,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:48,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1036867019, now seen corresponding path program 1 times [2020-10-27 01:08:48,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:48,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078551745] [2020-10-27 01:08:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:48,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:49,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:49,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:50,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:50,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:08:50,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:08:50,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1774 [2020-10-27 01:08:50,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:50,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:08:50,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:50,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:08:50,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:50,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:50,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:50,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:50,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:50,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:50,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:50,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:50,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:50,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:50,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:50,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:08:50,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078551745] [2020-10-27 01:08:50,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:08:50,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:08:50,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777503305] [2020-10-27 01:08:50,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:08:50,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:08:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:08:50,350 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand 8 states. [2020-10-27 01:08:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:50,726 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2020-10-27 01:08:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:08:50,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 01:08:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:50,729 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:08:50,729 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:08:50,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:08:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 107. [2020-10-27 01:08:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:08:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2020-10-27 01:08:50,746 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 33 [2020-10-27 01:08:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:50,747 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2020-10-27 01:08:50,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:08:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2020-10-27 01:08:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:08:50,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:50,748 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:50,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:08:50,749 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash 643840009, now seen corresponding path program 1 times [2020-10-27 01:08:50,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:50,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181181069] [2020-10-27 01:08:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:50,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:51,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:51,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:08:51,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:51,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 01:08:51,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:51,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:08:51,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:51,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:08:51,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:51,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:51,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:51,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:51,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:51,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:51,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:51,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:51,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:51,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:51,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181181069] [2020-10-27 01:08:51,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:51,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:51,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676527426] [2020-10-27 01:08:51,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:51,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:51,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:51,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:51,514 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand 11 states. [2020-10-27 01:08:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:52,127 INFO L93 Difference]: Finished difference Result 172 states and 221 transitions. [2020-10-27 01:08:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:08:52,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 01:08:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:52,130 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:08:52,130 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 01:08:52,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 01:08:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 121. [2020-10-27 01:08:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:08:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 158 transitions. [2020-10-27 01:08:52,151 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 158 transitions. Word has length 33 [2020-10-27 01:08:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:52,151 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 158 transitions. [2020-10-27 01:08:52,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 158 transitions. [2020-10-27 01:08:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:08:52,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:52,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:52,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:08:52,153 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1024037310, now seen corresponding path program 1 times [2020-10-27 01:08:52,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:52,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305630534] [2020-10-27 01:08:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:52,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:52,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:08:52,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:52,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 01:08:52,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:52,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:08:52,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:52,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:08:52,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:52,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:52,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:52,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:52,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:52,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:52,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:52,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:52,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:52,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:52,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305630534] [2020-10-27 01:08:52,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:52,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:08:52,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150949009] [2020-10-27 01:08:52,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:08:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:08:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:08:52,491 INFO L87 Difference]: Start difference. First operand 121 states and 158 transitions. Second operand 9 states. [2020-10-27 01:08:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:52,958 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2020-10-27 01:08:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:08:52,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 01:08:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:52,960 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:08:52,960 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:08:52,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:08:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-10-27 01:08:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:08:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 161 transitions. [2020-10-27 01:08:52,981 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 161 transitions. Word has length 33 [2020-10-27 01:08:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:52,981 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 161 transitions. [2020-10-27 01:08:52,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:08:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 161 transitions. [2020-10-27 01:08:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:08:52,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:52,993 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:52,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:08:52,995 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash 450061005, now seen corresponding path program 1 times [2020-10-27 01:08:52,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:52,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078852726] [2020-10-27 01:08:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:53,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:55,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:55,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:08:55,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:08:55,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2281 [2020-10-27 01:08:55,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:08:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:08:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:55,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:55,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:55,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:55,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:55,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:55,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:55,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:55,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:55,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:55,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:55,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078852726] [2020-10-27 01:08:55,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:55,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:08:55,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586247968] [2020-10-27 01:08:55,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:08:55,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:55,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:08:55,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:08:55,473 INFO L87 Difference]: Start difference. First operand 126 states and 161 transitions. Second operand 8 states. [2020-10-27 01:08:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:55,899 INFO L93 Difference]: Finished difference Result 174 states and 221 transitions. [2020-10-27 01:08:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:08:55,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 01:08:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:55,901 INFO L225 Difference]: With dead ends: 174 [2020-10-27 01:08:55,901 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 01:08:55,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:08:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 01:08:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2020-10-27 01:08:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 01:08:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2020-10-27 01:08:55,917 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 33 [2020-10-27 01:08:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:55,917 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2020-10-27 01:08:55,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:08:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2020-10-27 01:08:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:08:55,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:55,919 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:55,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:08:55,919 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:55,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1515530705, now seen corresponding path program 1 times [2020-10-27 01:08:55,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:55,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464951997] [2020-10-27 01:08:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:55,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:55,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:56,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:56,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:08:56,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:56,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 01:08:56,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:56,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:56,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:56,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:08:56,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:56,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:56,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:56,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:56,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:56,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:56,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:56,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:56,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464951997] [2020-10-27 01:08:56,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:56,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:56,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784654542] [2020-10-27 01:08:56,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:56,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:56,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:56,724 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand 11 states. [2020-10-27 01:08:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:57,742 INFO L93 Difference]: Finished difference Result 187 states and 238 transitions. [2020-10-27 01:08:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:08:57,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 01:08:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:57,746 INFO L225 Difference]: With dead ends: 187 [2020-10-27 01:08:57,746 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 01:08:57,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:08:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 01:08:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 135. [2020-10-27 01:08:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 01:08:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 173 transitions. [2020-10-27 01:08:57,760 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 173 transitions. Word has length 34 [2020-10-27 01:08:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:57,761 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 173 transitions. [2020-10-27 01:08:57,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 173 transitions. [2020-10-27 01:08:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:08:57,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:57,762 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:57,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:08:57,762 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1990993429, now seen corresponding path program 1 times [2020-10-27 01:08:57,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:57,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145500441] [2020-10-27 01:08:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:57,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:57,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:58,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:58,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:08:58,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:58,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-27 01:08:58,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:58,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:08:58,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:58,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:08:58,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:59,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:59,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:59,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:59,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:59,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:59,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:59,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:59,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:59,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145500441] [2020-10-27 01:08:59,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:59,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:59,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741494613] [2020-10-27 01:08:59,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:59,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:59,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:59,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:59,235 INFO L87 Difference]: Start difference. First operand 135 states and 173 transitions. Second operand 11 states. [2020-10-27 01:08:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:59,909 INFO L93 Difference]: Finished difference Result 184 states and 233 transitions. [2020-10-27 01:08:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:08:59,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 01:08:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:59,911 INFO L225 Difference]: With dead ends: 184 [2020-10-27 01:08:59,911 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 01:08:59,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 01:08:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 136. [2020-10-27 01:08:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:08:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2020-10-27 01:08:59,925 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 34 [2020-10-27 01:08:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:59,925 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 174 transitions. [2020-10-27 01:08:59,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 174 transitions. [2020-10-27 01:08:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:08:59,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:59,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:59,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:08:59,927 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1494627241, now seen corresponding path program 1 times [2020-10-27 01:08:59,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:59,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907811574] [2020-10-27 01:08:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:59,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:59,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:00,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:00,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:00,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:00,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:00,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:01,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:01,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:01,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:09:01,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-27 01:09:01,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:01,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:09:01,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:01,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:09:01,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:01,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:01,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:01,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:01,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:01,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:01,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:01,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907811574] [2020-10-27 01:09:01,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:01,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041842885] [2020-10-27 01:09:01,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:01,763 INFO L87 Difference]: Start difference. First operand 136 states and 174 transitions. Second operand 11 states. [2020-10-27 01:09:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:02,436 INFO L93 Difference]: Finished difference Result 175 states and 221 transitions. [2020-10-27 01:09:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:09:02,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 01:09:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:02,439 INFO L225 Difference]: With dead ends: 175 [2020-10-27 01:09:02,439 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:09:02,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:02,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:09:02,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2020-10-27 01:09:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 01:09:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 177 transitions. [2020-10-27 01:09:02,454 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 177 transitions. Word has length 34 [2020-10-27 01:09:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:02,454 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 177 transitions. [2020-10-27 01:09:02,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 177 transitions. [2020-10-27 01:09:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:09:02,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:02,455 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:02,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:09:02,455 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:02,456 INFO L82 PathProgramCache]: Analyzing trace with hash 317988957, now seen corresponding path program 2 times [2020-10-27 01:09:02,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:02,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813200369] [2020-10-27 01:09:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:02,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:02,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:02,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:03,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:03,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:09:03,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-27 01:09:03,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:03,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:03,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:03,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:09:03,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:03,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:03,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:03,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:03,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:03,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:03,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:03,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:03,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:03,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:03,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813200369] [2020-10-27 01:09:03,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:03,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103929474] [2020-10-27 01:09:03,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:03,364 INFO L87 Difference]: Start difference. First operand 139 states and 177 transitions. Second operand 11 states. [2020-10-27 01:09:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:03,999 INFO L93 Difference]: Finished difference Result 226 states and 291 transitions. [2020-10-27 01:09:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:09:03,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:09:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:04,001 INFO L225 Difference]: With dead ends: 226 [2020-10-27 01:09:04,001 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:09:04,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:09:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 154. [2020-10-27 01:09:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 01:09:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 196 transitions. [2020-10-27 01:09:04,017 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 196 transitions. Word has length 35 [2020-10-27 01:09:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:04,017 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 196 transitions. [2020-10-27 01:09:04,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:04,017 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 196 transitions. [2020-10-27 01:09:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:09:04,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:04,018 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:04,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:09:04,018 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash 285698622, now seen corresponding path program 1 times [2020-10-27 01:09:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:04,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637081780] [2020-10-27 01:09:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:04,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:04,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:04,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:09:04,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:04,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-27 01:09:04,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:09:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:04,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:09:04,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:05,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:05,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:05,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:05,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:05,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:05,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:05,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:05,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637081780] [2020-10-27 01:09:05,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:05,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466626695] [2020-10-27 01:09:05,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:05,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:05,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:05,270 INFO L87 Difference]: Start difference. First operand 154 states and 196 transitions. Second operand 11 states. [2020-10-27 01:09:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:05,887 INFO L93 Difference]: Finished difference Result 207 states and 262 transitions. [2020-10-27 01:09:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:05,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:09:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:05,889 INFO L225 Difference]: With dead ends: 207 [2020-10-27 01:09:05,889 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 01:09:05,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 01:09:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 167. [2020-10-27 01:09:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:09:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2020-10-27 01:09:05,907 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 35 [2020-10-27 01:09:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:05,908 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2020-10-27 01:09:05,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2020-10-27 01:09:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:09:05,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:05,909 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:05,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:09:05,909 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:05,910 INFO L82 PathProgramCache]: Analyzing trace with hash 255949343, now seen corresponding path program 3 times [2020-10-27 01:09:05,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:05,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521397116] [2020-10-27 01:09:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:05,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:06,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:06,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:09:06,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:06,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-27 01:09:06,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:09:06,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:06,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:06,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:06,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:06,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:06,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:06,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:06,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:06,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:06,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521397116] [2020-10-27 01:09:06,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:06,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:06,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041754097] [2020-10-27 01:09:06,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:06,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:06,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:06,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:06,834 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand 12 states. [2020-10-27 01:09:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:07,570 INFO L93 Difference]: Finished difference Result 214 states and 274 transitions. [2020-10-27 01:09:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:07,571 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-27 01:09:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:07,572 INFO L225 Difference]: With dead ends: 214 [2020-10-27 01:09:07,572 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 01:09:07,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 01:09:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 167. [2020-10-27 01:09:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:09:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2020-10-27 01:09:07,589 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 35 [2020-10-27 01:09:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:07,590 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2020-10-27 01:09:07,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2020-10-27 01:09:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:09:07,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:07,591 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:07,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:09:07,591 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1890511070, now seen corresponding path program 1 times [2020-10-27 01:09:07,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:07,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601708706] [2020-10-27 01:09:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:07,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:08,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:09:08,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:09:08,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-27 01:09:08,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:09:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:09:08,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:08,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:08,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:08,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:08,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:08,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:08,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:08,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:08,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:08,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:09:08,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601708706] [2020-10-27 01:09:08,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:08,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:09:08,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939292161] [2020-10-27 01:09:08,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:09:08,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:09:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:09:08,564 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand 6 states. [2020-10-27 01:09:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:08,800 INFO L93 Difference]: Finished difference Result 222 states and 282 transitions. [2020-10-27 01:09:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:09:08,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-27 01:09:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:08,802 INFO L225 Difference]: With dead ends: 222 [2020-10-27 01:09:08,802 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 01:09:08,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:09:08,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 01:09:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 165. [2020-10-27 01:09:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 01:09:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 208 transitions. [2020-10-27 01:09:08,821 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 208 transitions. Word has length 36 [2020-10-27 01:09:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:08,821 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 208 transitions. [2020-10-27 01:09:08,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:09:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 208 transitions. [2020-10-27 01:09:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:09:08,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:08,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:08,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:09:08,822 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:08,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2060301334, now seen corresponding path program 2 times [2020-10-27 01:09:08,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:08,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894060180] [2020-10-27 01:09:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:08,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:10,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:09:10,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:09:10,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1733 [2020-10-27 01:09:10,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:10,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:10,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:10,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:09:10,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:10,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:10,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:10,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:10,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:10,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:10,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:10,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:10,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:10,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:10,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:10,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894060180] [2020-10-27 01:09:10,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:10,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:10,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756000206] [2020-10-27 01:09:10,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:10,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:10,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:10,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:10,862 INFO L87 Difference]: Start difference. First operand 165 states and 208 transitions. Second operand 11 states. [2020-10-27 01:09:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:11,881 INFO L93 Difference]: Finished difference Result 240 states and 300 transitions. [2020-10-27 01:09:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:09:11,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-27 01:09:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:11,884 INFO L225 Difference]: With dead ends: 240 [2020-10-27 01:09:11,884 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 01:09:11,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:09:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 01:09:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 169. [2020-10-27 01:09:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 01:09:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2020-10-27 01:09:11,906 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 37 [2020-10-27 01:09:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:11,906 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2020-10-27 01:09:11,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2020-10-27 01:09:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:09:11,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:11,907 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:11,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:09:11,907 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:11,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1241712350, now seen corresponding path program 2 times [2020-10-27 01:09:11,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:11,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588795891] [2020-10-27 01:09:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:11,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:12,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:09:12,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:12,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-27 01:09:12,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:12,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:12,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:09:12,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:12,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:12,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:12,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:12,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:12,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:09:12,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:12,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:12,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:12,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:12,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:12,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588795891] [2020-10-27 01:09:12,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:12,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:12,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842750464] [2020-10-27 01:09:12,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:12,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:12,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:12,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:12,802 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand 11 states. [2020-10-27 01:09:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:13,398 INFO L93 Difference]: Finished difference Result 197 states and 247 transitions. [2020-10-27 01:09:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:09:13,398 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-27 01:09:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:13,400 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:09:13,400 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 01:09:13,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 01:09:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 167. [2020-10-27 01:09:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:09:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 211 transitions. [2020-10-27 01:09:13,425 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 211 transitions. Word has length 37 [2020-10-27 01:09:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:13,426 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 211 transitions. [2020-10-27 01:09:13,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 211 transitions. [2020-10-27 01:09:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:13,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:13,427 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:13,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:09:13,427 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1224846076, now seen corresponding path program 3 times [2020-10-27 01:09:13,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:13,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129436261] [2020-10-27 01:09:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:13,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:13,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:14,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:14,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:14,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:14,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-27 01:09:14,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:14,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:14,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:14,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:09:14,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:14,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:14,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:14,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:14,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:14,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:14,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:14,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129436261] [2020-10-27 01:09:14,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:14,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:14,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846861961] [2020-10-27 01:09:14,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:14,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:14,526 INFO L87 Difference]: Start difference. First operand 167 states and 211 transitions. Second operand 12 states. [2020-10-27 01:09:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:15,380 INFO L93 Difference]: Finished difference Result 272 states and 343 transitions. [2020-10-27 01:09:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:15,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 01:09:15,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:15,383 INFO L225 Difference]: With dead ends: 272 [2020-10-27 01:09:15,383 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 01:09:15,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 01:09:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 196. [2020-10-27 01:09:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 01:09:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 248 transitions. [2020-10-27 01:09:15,404 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 248 transitions. Word has length 38 [2020-10-27 01:09:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:15,405 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 248 transitions. [2020-10-27 01:09:15,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 248 transitions. [2020-10-27 01:09:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:15,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:15,406 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:15,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:09:15,406 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash 831819066, now seen corresponding path program 1 times [2020-10-27 01:09:15,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:15,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584764338] [2020-10-27 01:09:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:15,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:15,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:15,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:15,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:15,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:16,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:16,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:16,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:09:16,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1410 [2020-10-27 01:09:16,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:16,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:09:16,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:17,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:17,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:17,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:17,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:17,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:17,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:17,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:17,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:17,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:17,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584764338] [2020-10-27 01:09:17,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:17,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:17,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294352001] [2020-10-27 01:09:17,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:17,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:17,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:17,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:17,019 INFO L87 Difference]: Start difference. First operand 196 states and 248 transitions. Second operand 11 states. [2020-10-27 01:09:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:17,597 INFO L93 Difference]: Finished difference Result 258 states and 325 transitions. [2020-10-27 01:09:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:09:17,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-27 01:09:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:17,603 INFO L225 Difference]: With dead ends: 258 [2020-10-27 01:09:17,603 INFO L226 Difference]: Without dead ends: 212 [2020-10-27 01:09:17,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-27 01:09:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 198. [2020-10-27 01:09:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 01:09:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 248 transitions. [2020-10-27 01:09:17,628 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 248 transitions. Word has length 38 [2020-10-27 01:09:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:17,628 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 248 transitions. [2020-10-27 01:09:17,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 248 transitions. [2020-10-27 01:09:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:17,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:17,629 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:17,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:09:17,629 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1084297466, now seen corresponding path program 4 times [2020-10-27 01:09:17,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:17,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437869563] [2020-10-27 01:09:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:17,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:17,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:18,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:18,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:18,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:18,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 615 [2020-10-27 01:09:18,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:09:18,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:18,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:18,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:18,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:18,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:18,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:18,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:18,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:18,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:18,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:18,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:18,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:18,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437869563] [2020-10-27 01:09:18,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:18,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:18,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777129077] [2020-10-27 01:09:18,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:18,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:18,673 INFO L87 Difference]: Start difference. First operand 198 states and 248 transitions. Second operand 13 states. [2020-10-27 01:09:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:19,875 INFO L93 Difference]: Finished difference Result 298 states and 372 transitions. [2020-10-27 01:09:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:09:19,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 01:09:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:19,878 INFO L225 Difference]: With dead ends: 298 [2020-10-27 01:09:19,878 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 01:09:19,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:09:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 01:09:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 232. [2020-10-27 01:09:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 01:09:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 294 transitions. [2020-10-27 01:09:19,903 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 294 transitions. Word has length 38 [2020-10-27 01:09:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:19,903 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 294 transitions. [2020-10-27 01:09:19,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 294 transitions. [2020-10-27 01:09:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:19,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:19,904 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:19,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:09:19,905 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash -636820042, now seen corresponding path program 2 times [2020-10-27 01:09:19,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:19,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069214719] [2020-10-27 01:09:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:19,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:20,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:21,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:21,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:21,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:21,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1600 [2020-10-27 01:09:21,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:21,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:21,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:21,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:09:21,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:21,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:21,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:21,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:21,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:21,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:21,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:21,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:21,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069214719] [2020-10-27 01:09:21,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:21,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:21,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943214774] [2020-10-27 01:09:21,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:21,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:21,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:21,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:21,934 INFO L87 Difference]: Start difference. First operand 232 states and 294 transitions. Second operand 11 states. [2020-10-27 01:09:22,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:22,599 INFO L93 Difference]: Finished difference Result 259 states and 326 transitions. [2020-10-27 01:09:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:09:22,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-27 01:09:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:22,602 INFO L225 Difference]: With dead ends: 259 [2020-10-27 01:09:22,602 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 01:09:22,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 01:09:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 220. [2020-10-27 01:09:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-27 01:09:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 280 transitions. [2020-10-27 01:09:22,625 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 280 transitions. Word has length 38 [2020-10-27 01:09:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:22,626 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 280 transitions. [2020-10-27 01:09:22,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 280 transitions. [2020-10-27 01:09:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:09:22,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:22,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:22,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:09:22,627 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash -838489448, now seen corresponding path program 1 times [2020-10-27 01:09:22,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:22,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584258308] [2020-10-27 01:09:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:22,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:22,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:22,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:09:22,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:22,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 01:09:22,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:09:22,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:23,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:23,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:23,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:23,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:23,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:23,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:23,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:23,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:23,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:23,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:23,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584258308] [2020-10-27 01:09:23,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:23,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:23,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73718554] [2020-10-27 01:09:23,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:23,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:23,258 INFO L87 Difference]: Start difference. First operand 220 states and 280 transitions. Second operand 12 states. [2020-10-27 01:09:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:23,968 INFO L93 Difference]: Finished difference Result 299 states and 379 transitions. [2020-10-27 01:09:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:09:23,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 01:09:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:23,970 INFO L225 Difference]: With dead ends: 299 [2020-10-27 01:09:23,970 INFO L226 Difference]: Without dead ends: 295 [2020-10-27 01:09:23,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-27 01:09:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 241. [2020-10-27 01:09:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-27 01:09:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 306 transitions. [2020-10-27 01:09:23,998 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 306 transitions. Word has length 39 [2020-10-27 01:09:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:23,998 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 306 transitions. [2020-10-27 01:09:23,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 306 transitions. [2020-10-27 01:09:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:09:23,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:23,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:23,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:09:24,000 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:24,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1231516458, now seen corresponding path program 1 times [2020-10-27 01:09:24,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:24,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118734762] [2020-10-27 01:09:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:24,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:25,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:25,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:09:25,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:25,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1423 [2020-10-27 01:09:25,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:25,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:25,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:25,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:09:25,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:25,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:25,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:25,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:25,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:25,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:25,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:25,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:25,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:25,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:09:25,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118734762] [2020-10-27 01:09:25,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:25,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:25,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048333228] [2020-10-27 01:09:25,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:25,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:25,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:25,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:25,786 INFO L87 Difference]: Start difference. First operand 241 states and 306 transitions. Second operand 12 states. [2020-10-27 01:09:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:26,985 INFO L93 Difference]: Finished difference Result 320 states and 402 transitions. [2020-10-27 01:09:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:09:26,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 01:09:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:26,987 INFO L225 Difference]: With dead ends: 320 [2020-10-27 01:09:26,987 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 01:09:26,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:09:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 01:09:27,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 244. [2020-10-27 01:09:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-27 01:09:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 309 transitions. [2020-10-27 01:09:27,014 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 309 transitions. Word has length 39 [2020-10-27 01:09:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:27,014 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 309 transitions. [2020-10-27 01:09:27,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 309 transitions. [2020-10-27 01:09:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:09:27,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:27,015 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:27,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:09:27,016 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:27,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2143124991, now seen corresponding path program 1 times [2020-10-27 01:09:27,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:27,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055425421] [2020-10-27 01:09:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:27,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:27,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:27,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:27,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:09:27,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:27,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-27 01:09:27,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:09:27,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:28,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:28,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:28,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:28,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:28,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:28,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055425421] [2020-10-27 01:09:28,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:28,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:28,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365806071] [2020-10-27 01:09:28,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:28,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:28,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:28,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:28,366 INFO L87 Difference]: Start difference. First operand 244 states and 309 transitions. Second operand 13 states. [2020-10-27 01:09:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:29,477 INFO L93 Difference]: Finished difference Result 308 states and 389 transitions. [2020-10-27 01:09:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:29,482 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 01:09:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:29,484 INFO L225 Difference]: With dead ends: 308 [2020-10-27 01:09:29,484 INFO L226 Difference]: Without dead ends: 304 [2020-10-27 01:09:29,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:09:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-27 01:09:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 241. [2020-10-27 01:09:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-27 01:09:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 305 transitions. [2020-10-27 01:09:29,512 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 305 transitions. Word has length 40 [2020-10-27 01:09:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:29,512 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 305 transitions. [2020-10-27 01:09:29,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 305 transitions. [2020-10-27 01:09:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:09:29,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:29,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:29,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:09:29,514 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:29,514 INFO L82 PathProgramCache]: Analyzing trace with hash -640698289, now seen corresponding path program 5 times [2020-10-27 01:09:29,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:29,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993771821] [2020-10-27 01:09:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:29,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:29,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:29,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:30,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:09:30,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 01:09:30,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:09:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:09:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:30,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:30,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:30,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:30,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:30,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:30,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:30,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:30,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:30,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:30,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:09:30,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993771821] [2020-10-27 01:09:30,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:30,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:09:30,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698514311] [2020-10-27 01:09:30,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:09:30,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:09:30,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:30,509 INFO L87 Difference]: Start difference. First operand 241 states and 305 transitions. Second operand 10 states. [2020-10-27 01:09:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:31,167 INFO L93 Difference]: Finished difference Result 301 states and 376 transitions. [2020-10-27 01:09:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:31,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 01:09:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:31,170 INFO L225 Difference]: With dead ends: 301 [2020-10-27 01:09:31,170 INFO L226 Difference]: Without dead ends: 255 [2020-10-27 01:09:31,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-27 01:09:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 237. [2020-10-27 01:09:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 01:09:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 298 transitions. [2020-10-27 01:09:31,190 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 298 transitions. Word has length 40 [2020-10-27 01:09:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:31,190 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 298 transitions. [2020-10-27 01:09:31,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:09:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 298 transitions. [2020-10-27 01:09:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:09:31,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:31,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:31,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:09:31,191 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash -698566340, now seen corresponding path program 1 times [2020-10-27 01:09:31,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:31,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737654067] [2020-10-27 01:09:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:31,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:31,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:32,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:32,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:09:32,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:32,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1177 [2020-10-27 01:09:32,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:32,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:32,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:32,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:09:32,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:32,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:32,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:32,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:32,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:32,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:32,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:32,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:32,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:32,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737654067] [2020-10-27 01:09:32,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:32,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:32,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483703532] [2020-10-27 01:09:32,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:32,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:32,822 INFO L87 Difference]: Start difference. First operand 237 states and 298 transitions. Second operand 12 states. [2020-10-27 01:09:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:33,628 INFO L93 Difference]: Finished difference Result 300 states and 376 transitions. [2020-10-27 01:09:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:09:33,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 01:09:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:33,630 INFO L225 Difference]: With dead ends: 300 [2020-10-27 01:09:33,631 INFO L226 Difference]: Without dead ends: 296 [2020-10-27 01:09:33,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-27 01:09:33,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 244. [2020-10-27 01:09:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-27 01:09:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 306 transitions. [2020-10-27 01:09:33,660 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 306 transitions. Word has length 40 [2020-10-27 01:09:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:33,660 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 306 transitions. [2020-10-27 01:09:33,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 306 transitions. [2020-10-27 01:09:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:09:33,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:33,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:33,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:09:33,661 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:33,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2498238, now seen corresponding path program 1 times [2020-10-27 01:09:33,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:33,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663407768] [2020-10-27 01:09:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:33,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:33,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:34,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:34,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:36,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:36,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:09:36,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:09:36,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3046 [2020-10-27 01:09:36,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:36,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:09:36,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:37,163 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 27 [2020-10-27 01:09:37,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:37,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:37,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:37,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:37,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:37,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:37,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:37,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:37,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:37,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:09:37,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663407768] [2020-10-27 01:09:37,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:37,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:37,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368390106] [2020-10-27 01:09:37,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:37,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:37,293 INFO L87 Difference]: Start difference. First operand 244 states and 306 transitions. Second operand 12 states. [2020-10-27 01:09:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:38,485 INFO L93 Difference]: Finished difference Result 292 states and 364 transitions. [2020-10-27 01:09:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:09:38,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 01:09:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:38,488 INFO L225 Difference]: With dead ends: 292 [2020-10-27 01:09:38,488 INFO L226 Difference]: Without dead ends: 280 [2020-10-27 01:09:38,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:09:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-27 01:09:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 251. [2020-10-27 01:09:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 01:09:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 314 transitions. [2020-10-27 01:09:38,516 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 314 transitions. Word has length 40 [2020-10-27 01:09:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:38,517 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 314 transitions. [2020-10-27 01:09:38,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 314 transitions. [2020-10-27 01:09:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:09:38,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:38,518 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:38,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:09:38,518 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2060986365, now seen corresponding path program 6 times [2020-10-27 01:09:38,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:38,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656103228] [2020-10-27 01:09:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:38,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:38,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:38,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:39,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:39,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:09:39,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:39,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-27 01:09:39,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:09:39,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:39,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:39,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:39,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:39,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:39,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:39,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:39,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:39,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656103228] [2020-10-27 01:09:39,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:39,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:39,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593376565] [2020-10-27 01:09:39,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:39,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:39,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:39,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:39,727 INFO L87 Difference]: Start difference. First operand 251 states and 314 transitions. Second operand 13 states. [2020-10-27 01:09:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:41,121 INFO L93 Difference]: Finished difference Result 327 states and 409 transitions. [2020-10-27 01:09:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:09:41,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 01:09:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:41,125 INFO L225 Difference]: With dead ends: 327 [2020-10-27 01:09:41,125 INFO L226 Difference]: Without dead ends: 323 [2020-10-27 01:09:41,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:09:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-27 01:09:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 272. [2020-10-27 01:09:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 01:09:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 344 transitions. [2020-10-27 01:09:41,155 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 344 transitions. Word has length 41 [2020-10-27 01:09:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:41,155 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 344 transitions. [2020-10-27 01:09:41,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 344 transitions. [2020-10-27 01:09:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:09:41,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:41,157 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:41,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:09:41,157 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:41,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1807404787, now seen corresponding path program 1 times [2020-10-27 01:09:41,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:41,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734654914] [2020-10-27 01:09:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:41,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:42,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:42,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:09:42,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:42,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-10-27 01:09:42,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:42,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:42,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:09:42,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:42,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:42,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:42,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:42,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:42,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:42,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:42,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:42,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734654914] [2020-10-27 01:09:42,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:42,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:42,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253650871] [2020-10-27 01:09:42,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:42,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:42,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:42,787 INFO L87 Difference]: Start difference. First operand 272 states and 344 transitions. Second operand 13 states. [2020-10-27 01:09:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:43,585 INFO L93 Difference]: Finished difference Result 329 states and 415 transitions. [2020-10-27 01:09:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:43,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 01:09:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:43,588 INFO L225 Difference]: With dead ends: 329 [2020-10-27 01:09:43,589 INFO L226 Difference]: Without dead ends: 314 [2020-10-27 01:09:43,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:09:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-27 01:09:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 258. [2020-10-27 01:09:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-27 01:09:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 327 transitions. [2020-10-27 01:09:43,618 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 327 transitions. Word has length 41 [2020-10-27 01:09:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:43,618 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 327 transitions. [2020-10-27 01:09:43,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 327 transitions. [2020-10-27 01:09:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:09:43,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:43,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:43,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:09:43,620 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:43,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1696232717, now seen corresponding path program 1 times [2020-10-27 01:09:43,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:43,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557469832] [2020-10-27 01:09:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:43,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:44,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:44,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:09:44,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:44,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-27 01:09:44,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:44,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:44,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:44,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:09:44,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:44,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:44,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:44,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:44,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:44,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:44,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:44,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:44,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:44,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557469832] [2020-10-27 01:09:44,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:44,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:44,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799134351] [2020-10-27 01:09:44,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:44,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:44,311 INFO L87 Difference]: Start difference. First operand 258 states and 327 transitions. Second operand 12 states. [2020-10-27 01:09:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:45,022 INFO L93 Difference]: Finished difference Result 314 states and 395 transitions. [2020-10-27 01:09:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:45,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-27 01:09:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:45,025 INFO L225 Difference]: With dead ends: 314 [2020-10-27 01:09:45,025 INFO L226 Difference]: Without dead ends: 310 [2020-10-27 01:09:45,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-27 01:09:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 258. [2020-10-27 01:09:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-27 01:09:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 327 transitions. [2020-10-27 01:09:45,055 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 327 transitions. Word has length 41 [2020-10-27 01:09:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:45,055 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 327 transitions. [2020-10-27 01:09:45,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 327 transitions. [2020-10-27 01:09:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:09:45,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:45,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:45,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:09:45,057 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1954398155, now seen corresponding path program 1 times [2020-10-27 01:09:45,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:45,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977582754] [2020-10-27 01:09:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:45,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:45,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:45,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:45,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2172 [2020-10-27 01:09:47,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:09:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:09:47,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:47,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:47,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:47,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:47,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:47,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:47,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:47,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:47,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:09:47,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977582754] [2020-10-27 01:09:47,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:47,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:09:47,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064050608] [2020-10-27 01:09:47,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:09:47,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:09:47,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:09:47,534 INFO L87 Difference]: Start difference. First operand 258 states and 327 transitions. Second operand 12 states. [2020-10-27 01:09:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:48,729 INFO L93 Difference]: Finished difference Result 299 states and 375 transitions. [2020-10-27 01:09:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:09:48,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-27 01:09:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:48,733 INFO L225 Difference]: With dead ends: 299 [2020-10-27 01:09:48,733 INFO L226 Difference]: Without dead ends: 295 [2020-10-27 01:09:48,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:09:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-27 01:09:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 261. [2020-10-27 01:09:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 01:09:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 331 transitions. [2020-10-27 01:09:48,763 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 331 transitions. Word has length 41 [2020-10-27 01:09:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:48,764 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 331 transitions. [2020-10-27 01:09:48,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:09:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 331 transitions. [2020-10-27 01:09:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:09:48,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:48,765 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:48,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:09:48,765 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1384077270, now seen corresponding path program 1 times [2020-10-27 01:09:48,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:48,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269771359] [2020-10-27 01:09:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:48,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:48,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:48,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:09:48,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-27 01:09:48,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:09:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 01:09:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:09:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:48,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:48,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:48,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:48,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:48,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:48,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:48,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 01:09:48,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269771359] [2020-10-27 01:09:48,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:09:48,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:09:48,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277739075] [2020-10-27 01:09:48,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:09:48,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:48,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:09:48,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:09:48,915 INFO L87 Difference]: Start difference. First operand 261 states and 331 transitions. Second operand 4 states. [2020-10-27 01:09:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:49,103 INFO L93 Difference]: Finished difference Result 430 states and 543 transitions. [2020-10-27 01:09:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:09:49,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 01:09:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:49,105 INFO L225 Difference]: With dead ends: 430 [2020-10-27 01:09:49,106 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 01:09:49,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:09:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 01:09:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2020-10-27 01:09:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 01:09:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2020-10-27 01:09:49,137 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 41 [2020-10-27 01:09:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:49,137 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2020-10-27 01:09:49,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:09:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2020-10-27 01:09:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:09:49,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:49,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:49,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:09:49,139 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1819325621, now seen corresponding path program 1 times [2020-10-27 01:09:49,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:49,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780797789] [2020-10-27 01:09:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:49,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:49,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:49,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:09:49,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 01:09:49,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:09:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:09:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:49,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:49,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:49,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:49,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:49,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:49,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:49,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:49,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:49,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:49,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:49,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:09:49,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780797789] [2020-10-27 01:09:49,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:49,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:09:49,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859863912] [2020-10-27 01:09:49,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:09:49,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:49,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:09:49,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:49,603 INFO L87 Difference]: Start difference. First operand 233 states and 285 transitions. Second operand 10 states. [2020-10-27 01:09:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:50,272 INFO L93 Difference]: Finished difference Result 306 states and 375 transitions. [2020-10-27 01:09:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:50,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-27 01:09:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:50,274 INFO L225 Difference]: With dead ends: 306 [2020-10-27 01:09:50,274 INFO L226 Difference]: Without dead ends: 283 [2020-10-27 01:09:50,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-27 01:09:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 246. [2020-10-27 01:09:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-27 01:09:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 299 transitions. [2020-10-27 01:09:50,304 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 299 transitions. Word has length 42 [2020-10-27 01:09:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:50,304 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 299 transitions. [2020-10-27 01:09:50,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:09:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 299 transitions. [2020-10-27 01:09:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:09:50,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:50,306 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:50,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:09:50,306 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:50,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2144312884, now seen corresponding path program 1 times [2020-10-27 01:09:50,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:50,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387390589] [2020-10-27 01:09:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:50,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:50,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:50,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:51,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:51,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:09:51,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-10-27 01:09:51,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:09:51,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:51,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:51,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:51,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:51,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:51,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:51,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:51,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387390589] [2020-10-27 01:09:51,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:51,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:51,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274907833] [2020-10-27 01:09:51,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:51,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:51,890 INFO L87 Difference]: Start difference. First operand 246 states and 299 transitions. Second operand 13 states. [2020-10-27 01:09:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:52,796 INFO L93 Difference]: Finished difference Result 298 states and 363 transitions. [2020-10-27 01:09:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:52,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 01:09:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:52,798 INFO L225 Difference]: With dead ends: 298 [2020-10-27 01:09:52,798 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 01:09:52,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:09:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 01:09:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 237. [2020-10-27 01:09:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 01:09:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 289 transitions. [2020-10-27 01:09:52,825 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 289 transitions. Word has length 42 [2020-10-27 01:09:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:52,826 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 289 transitions. [2020-10-27 01:09:52,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 289 transitions. [2020-10-27 01:09:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:09:52,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:52,827 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:52,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:09:52,827 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1318619581, now seen corresponding path program 2 times [2020-10-27 01:09:52,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:52,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387444117] [2020-10-27 01:09:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:53,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:09:53,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 01:09:53,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:53,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:53,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:09:53,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:53,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:53,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:53,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:53,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:53,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:53,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:53,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:53,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:53,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:53,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:09:53,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387444117] [2020-10-27 01:09:53,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:53,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:09:53,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247535495] [2020-10-27 01:09:53,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:09:53,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:09:53,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:09:53,649 INFO L87 Difference]: Start difference. First operand 237 states and 289 transitions. Second operand 11 states. [2020-10-27 01:09:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:54,194 INFO L93 Difference]: Finished difference Result 357 states and 444 transitions. [2020-10-27 01:09:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:54,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 01:09:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:54,197 INFO L225 Difference]: With dead ends: 357 [2020-10-27 01:09:54,197 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 01:09:54,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 01:09:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 237. [2020-10-27 01:09:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 01:09:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 286 transitions. [2020-10-27 01:09:54,224 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 286 transitions. Word has length 42 [2020-10-27 01:09:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:54,225 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 286 transitions. [2020-10-27 01:09:54,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:09:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 286 transitions. [2020-10-27 01:09:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:09:54,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:54,226 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:54,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:09:54,226 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 659977859, now seen corresponding path program 1 times [2020-10-27 01:09:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:54,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531339500] [2020-10-27 01:09:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:09:54,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:55,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:55,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:55,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:55,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531339500] [2020-10-27 01:09:55,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:55,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:55,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46549359] [2020-10-27 01:09:55,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:55,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:55,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:55,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:55,259 INFO L87 Difference]: Start difference. First operand 237 states and 286 transitions. Second operand 14 states. [2020-10-27 01:09:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:56,449 INFO L93 Difference]: Finished difference Result 297 states and 365 transitions. [2020-10-27 01:09:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:09:56,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-27 01:09:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:56,451 INFO L225 Difference]: With dead ends: 297 [2020-10-27 01:09:56,451 INFO L226 Difference]: Without dead ends: 293 [2020-10-27 01:09:56,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:09:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-27 01:09:56,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 254. [2020-10-27 01:09:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-27 01:09:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 308 transitions. [2020-10-27 01:09:56,479 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 308 transitions. Word has length 42 [2020-10-27 01:09:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:56,479 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 308 transitions. [2020-10-27 01:09:56,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 308 transitions. [2020-10-27 01:09:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:09:56,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:56,481 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:56,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:09:56,481 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2068813507, now seen corresponding path program 2 times [2020-10-27 01:09:56,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:56,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43121283] [2020-10-27 01:09:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:56,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:56,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:09:56,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:56,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:09:56,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:09:56,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:57,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:57,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:57,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:57,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:57,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:57,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:57,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:57,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:57,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:57,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:57,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:57,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43121283] [2020-10-27 01:09:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521720074] [2020-10-27 01:09:57,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:57,436 INFO L87 Difference]: Start difference. First operand 254 states and 308 transitions. Second operand 13 states. [2020-10-27 01:09:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:58,297 INFO L93 Difference]: Finished difference Result 336 states and 409 transitions. [2020-10-27 01:09:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:09:58,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 01:09:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:58,298 INFO L225 Difference]: With dead ends: 336 [2020-10-27 01:09:58,298 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 01:09:58,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 01:09:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 251. [2020-10-27 01:09:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 01:09:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 302 transitions. [2020-10-27 01:09:58,326 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 302 transitions. Word has length 42 [2020-10-27 01:09:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:58,326 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 302 transitions. [2020-10-27 01:09:58,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 302 transitions. [2020-10-27 01:09:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:09:58,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:58,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:58,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:09:58,328 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash 89322175, now seen corresponding path program 1 times [2020-10-27 01:09:58,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:58,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168177193] [2020-10-27 01:09:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:09:58,344 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:09:58,344 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:09:58,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:09:58,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:09:58 BoogieIcfgContainer [2020-10-27 01:09:58,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:09:58,372 INFO L168 Benchmark]: Toolchain (without parser) took 81150.12 ms. Allocated memory was 151.0 MB in the beginning and 602.9 MB in the end (delta: 451.9 MB). Free memory was 124.9 MB in the beginning and 496.9 MB in the end (delta: -372.0 MB). Peak memory consumption was 80.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:09:58,373 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.4 MB in the end (delta: 77.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:09:58,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 756.51 ms. Allocated memory is still 151.0 MB. Free memory was 124.4 MB in the beginning and 101.9 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:09:58,374 INFO L168 Benchmark]: Boogie Preprocessor took 95.20 ms. Allocated memory is still 151.0 MB. Free memory was 101.9 MB in the beginning and 132.4 MB in the end (delta: -30.5 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:09:58,374 INFO L168 Benchmark]: RCFGBuilder took 793.25 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 83.6 MB in the end (delta: 48.8 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2020-10-27 01:09:58,374 INFO L168 Benchmark]: TraceAbstraction took 79479.89 ms. Allocated memory was 151.0 MB in the beginning and 602.9 MB in the end (delta: 451.9 MB). Free memory was 83.1 MB in the beginning and 496.9 MB in the end (delta: -413.8 MB). Peak memory consumption was 37.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:09:58,376 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.4 MB in the end (delta: 77.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 756.51 ms. Allocated memory is still 151.0 MB. Free memory was 124.4 MB in the beginning and 101.9 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 95.20 ms. Allocated memory is still 151.0 MB. Free memory was 101.9 MB in the beginning and 132.4 MB in the end (delta: -30.5 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 793.25 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 83.6 MB in the end (delta: 48.8 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 79479.89 ms. Allocated memory was 151.0 MB in the beginning and 602.9 MB in the end (delta: 451.9 MB). Free memory was 83.1 MB in the beginning and 496.9 MB in the end (delta: -413.8 MB). Peak memory consumption was 37.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) [L998] head->data = 0 [L1000] SLL* x = head; [L1001] int marked = 0; [L1004] COND TRUE __VERIFIER_nondet_int() || !marked [L1007] x->next = malloc(sizeof(SLL)) [L1008] EXPR x->next [L1008] x = x->next [L1009] x->next = ((void*)0) [L1011] COND TRUE __VERIFIER_nondet_int() [L1013] marked = 1 [L1016] COND TRUE \read(marked) [L1017] x->data = 1 [L1004] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1022] x = head [L1024] COND FALSE !(!(((void*)0) != x)) [L1025] marked = 0 [L1027] EXPR x->next [L1027] x->next != ((void*)0) && x->next->data == 0 [L1027] EXPR x->next [L1027] EXPR x->next->data [L1027] x->next != ((void*)0) && x->next->data == 0 [L1027] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1032] EXPR x->next [L1032] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1032] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1032] COND FALSE !(x->next != ((void*)0) && __VERIFIER_nondet_int()) [L1038] SLL* tmp = malloc(sizeof(SLL)); [L1039] tmp->data = 1 [L1040] tmp->next = ((void*)0) [L1041] EXPR x->next [L1041] COND FALSE !(x->next == ((void*)0)) [L1045] EXPR x->next [L1045] tmp->next = x->next [L1046] x->next = tmp [L1049] marked = 0 [L1050] x = head [L1052] x != ((void*)0) && x->data != 1 [L1052] EXPR x->data [L1052] x != ((void*)0) && x->data != 1 [L1052] COND TRUE x != ((void*)0) && x->data != 1 [L1054] EXPR x->data [L1054] marked = x->data [L1055] EXPR x->data [L1055] COND FALSE !(!(x->data == 0)) [L1056] COND FALSE !(!(marked == 0)) [L1057] EXPR x->next [L1057] x = x->next [L1052] x != ((void*)0) && x->data != 1 [L1052] EXPR x->data [L1052] x != ((void*)0) && x->data != 1 [L1052] COND FALSE !(x != ((void*)0) && x->data != 1) [L1059] COND TRUE x != ((void*)0) [L1061] EXPR x->data [L1061] marked = x->data [L1062] EXPR x->data [L1062] COND TRUE !(x->data != 1) [L1062] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "sll-sorted-1.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 66 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 79.3s, OverallIterations: 41, TraceHistogramMax: 5, AutomataDifference: 29.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2349 SDtfs, 4214 SDslu, 12020 SDs, 0 SdLazy, 14577 SolverSat, 1380 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 684 GetRequests, 134 SyntacticMatches, 13 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=272occurred in iteration=31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 40 MinimizatonAttempts, 1380 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 47.8s InterpolantComputationTime, 1482 NumberOfCodeBlocks, 1482 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1399 ConstructedInterpolants, 0 QuantifiedInterpolants, 934559 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 40 InterpolantComputations, 5 PerfectInterpolantSequences, 65/446 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...